# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1249151 | redacode | Dancing Elephants (IOI11_elephants) | C++20 | Compilation error | 0 ms | 0 KiB |
#include "elephants.h"
#include "bits/stdc++.h"
using namespace std;
int n;
int l;
bool cmp(pair<int, int>& a,
pair<int, int>& b)
{
return a.second < b.second;
}
set<pair<int, int> > A;
void sort_map(map<int, int>& M)
{
A.clear();
for (auto& it : M) {
A.push_back(it);
}
sort(A.begin(), A.end(), cmp);
}
map<int,int> pos;
void init(int N, int L, int X[])
{
n = N;
l =L;
for(int i=0;i<n;i++){
pos[i]=X[i];
A.insert({i,X[i]});
}
}
int update(int i, int y)
{
if(n==1){
return 1;
}
A.erase({i,pos[i]});
pos[i]=y;
A.insert({i,pos[i]});
//sort_map(pos);
int cnt =0;
int start = *A.begin();
for(auto&: it){
if(it.second-start>l){
start = it.second;
cnt++;
}
if(i==n-1) cnt++;
}
if(cnt==0)cnt++;
return cnt;
}
Compilation message (stderr)
elephants.cpp: In function 'void sort_map(std::map<int, int>&)': elephants.cpp:18:11: error: 'class std::set<std::pair<int, int> >' has no member named 'push_back' 18 | A.push_back(it); | ^~~~~~~~~ elephants.cpp: In function 'int update(int, int)': elephants.cpp:49:16: error: cannot convert 'const std::pair<int, int>' to 'int' in initialization 49 | int start = *A.begin(); | ^~~~~~~~~~ | | | const std::pair<int, int> elephants.cpp:50:13: error: expected unqualified-id before ':' token 50 | for(auto&: it){ | ^ elephants.cpp:50:15: error: 'it' was not declared in this scope; did you mean 'i'? 50 | for(auto&: it){ | ^~ | i In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h: In instantiation of 'constexpr void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = std::_Rb_tree_const_iterator<std::pair<int, int> >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(std::pair<int, int>&, std::pair<int, int>&)>]': /usr/include/c++/11/bits/stl_algo.h:4875:18: required from 'constexpr void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = std::_Rb_tree_const_iterator<std::pair<int, int> >; _Compare = bool (*)(std::pair<int, int>&, std::pair<int, int>&)]' elephants.cpp:21:9: required from here /usr/include/c++/11/bits/stl_algo.h:1955:50: error: no match for 'operator-' (operand types are 'std::_Rb_tree_const_iterator<std::pair<int, int> >' and 'std::_Rb_tree_const_iterator<std::pair<int, int> >') 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/bits/stl_algobase.h:67, from /usr/include/c++/11/bits/specfun.h:45, from /usr/include/c++/11/cmath:1935, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41, from elephants.cpp:2: /usr/include/c++/11/bits/stl_iterator.h:577:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const std::reverse_iterator<_IteratorL>&, const std::reverse_iterator<_IteratorR>&)' 577 | operator-(const reverse_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/11/bits/stl_iterator.h:577:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::reverse_iterator<_IteratorL>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/bits/stl_algobase.h:67, from /usr/include/c++/11/bits/specfun.h:45, from /usr/include/c++/11/cmath:1935, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41, from elephants.cpp:2: /usr/include/c++/11/bits/stl_iterator.h:1693:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__x.base() - __y.base())) std::operator-(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)' 1693 | operator-(const move_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/11/bits/stl_iterator.h:1693:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::move_iterator<_IteratorL>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/complex:362:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const std::complex<_Tp>&, const std::complex<_Tp>&)' 362 | operator-(const complex<_Tp>& __x, const complex<_Tp>& __y) | ^~~~~~~~ /usr/include/c++/11/complex:362:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::complex<_Tp>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/complex:371:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const std::complex<_Tp>&, const _Tp&)' 371 | operator-(const complex<_Tp>& __x, const _Tp& __y) | ^~~~~~~~ /usr/include/c++/11/complex:371:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::complex<_Tp>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/complex:380:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const _Tp&, const std::complex<_Tp>&)' 380 | operator-(const _Tp& __x, const complex<_Tp>& __y) | ^~~~~~~~ /usr/include/c++/11/complex:380:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::complex<_Tp>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/complex:457:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const std::complex<_Tp>&)' 457 | operator-(const complex<_Tp>& __x) | ^~~~~~~~ /usr/include/c++/11/complex:457:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::complex<_Tp>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const std::valarray<_Tp>&, const std::valarray<_Tp>&)' 1187 | _DEFINE_BINARY_OPERATOR(-, __minus) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1187:1: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::valarray<_Tp>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const std::valarray<_Tp>&, const typename std::valarray<_Tp>::value_type&)' 1187 | _DEFINE_BINARY_OPERATOR(-, __minus) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1187:1: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::valarray<_Tp>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const typename std::valarray<_Tp>::value_type&, const std::valarray<_Tp>&)' 1187 | _DEFINE_BINARY_OPERATOR(-, __minus) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1187:1: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1955:50: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::valarray<_Tp>' 1955 | std::__lg(__last - __first) * 2, | ~~~~~~~^~~~~~~~~ /usr/include/c++/11/bits/stl_algo.h: In instantiation of 'constexpr void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = std::_Rb_tree_const_iterator<std::pair<int, int> >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(std::pair<int, int>&, std::pair<int, int>&)>]': /usr/include/c++/11/bits/stl_algo.h:1957:31: required from 'constexpr void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = std::_Rb_tree_const_iterator<std::pair<int, int> >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(std::pair<int, int>&, std::pair<int, int>&)>]' /usr/include/c++/11/bits/stl_algo.h:4875:18: required from 'constexpr void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = std::_Rb_tree_const_iterator<std::pair<int, int> >; _Compare = bool (*)(std::pair<int, int>&, std::pair<int, int>&)]' elephants.cpp:21:9: required from here /usr/include/c++/11/bits/stl_algo.h:1864:18: error: no match for 'operator-' (operand types are 'std::_Rb_tree_const_iterator<std::pair<int, int> >' and 'std::_Rb_tree_const_iterator<std::pair<int, int> >') 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/bits/stl_algobase.h:67, from /usr/include/c++/11/bits/specfun.h:45, from /usr/include/c++/11/cmath:1935, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41, from elephants.cpp:2: /usr/include/c++/11/bits/stl_iterator.h:577:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const std::reverse_iterator<_IteratorL>&, const std::reverse_iterator<_IteratorR>&)' 577 | operator-(const reverse_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/11/bits/stl_iterator.h:577:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::reverse_iterator<_IteratorL>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/bits/stl_algobase.h:67, from /usr/include/c++/11/bits/specfun.h:45, from /usr/include/c++/11/cmath:1935, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41, from elephants.cpp:2: /usr/include/c++/11/bits/stl_iterator.h:1693:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__x.base() - __y.base())) std::operator-(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)' 1693 | operator-(const move_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/11/bits/stl_iterator.h:1693:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::move_iterator<_IteratorL>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/complex:362:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const std::complex<_Tp>&, const std::complex<_Tp>&)' 362 | operator-(const complex<_Tp>& __x, const complex<_Tp>& __y) | ^~~~~~~~ /usr/include/c++/11/complex:362:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::complex<_Tp>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/complex:371:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const std::complex<_Tp>&, const _Tp&)' 371 | operator-(const complex<_Tp>& __x, const _Tp& __y) | ^~~~~~~~ /usr/include/c++/11/complex:371:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::complex<_Tp>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/complex:380:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const _Tp&, const std::complex<_Tp>&)' 380 | operator-(const _Tp& __x, const complex<_Tp>& __y) | ^~~~~~~~ /usr/include/c++/11/complex:380:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::complex<_Tp>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/complex:457:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const std::complex<_Tp>&)' 457 | operator-(const complex<_Tp>& __x) | ^~~~~~~~ /usr/include/c++/11/complex:457:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::complex<_Tp>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)' 406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const std::valarray<_Tp>&, const std::valarray<_Tp>&)' 1187 | _DEFINE_BINARY_OPERATOR(-, __minus) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1187:1: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::valarray<_Tp>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const std::valarray<_Tp>&, const typename std::valarray<_Tp>::value_type&)' 1187 | _DEFINE_BINARY_OPERATOR(-, __minus) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1187:1: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::valarray<_Tp>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from elephants.cpp:2: /usr/include/c++/11/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const typename std::valarray<_Tp>::value_type&, const std::valarray<_Tp>&)' 1187 | _DEFINE_BINARY_OPERATOR(-, __minus) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1187:1: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1864:18: note: 'std::_Rb_tree_const_iterator<std::pair<int, int> >' is not derived from 'const std::valarray<_Tp>' 1864 | if (__last - __first > int(_S_threshold)) | ~~~~~~~^~~~~~~~~ /usr/include/c++/11/bits/stl_algo.h:1866:50: error: no match for 'operator+' (operand types are 'std::_Rb_tree_const_iterator<std::pair<int, int> >' and 'int') 1866 | std::__insertion_sort(__first, __first + int(_S_threshold), __comp); | ~~~~~~~~^~~~~~~~~~~~~~~~~~~ In file included from /usr/include/c++/11/bits/stl_algobase.h:67, from /usr/include/c++/11/bits/specfun.h:45, from /usr/include/c++/11/cmath:1935, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41, from elephants.cpp:2: /usr/include/c++/11/bits/stl_iterator.h:585:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_IteratorL> std::operator+(typename std::reverse_iterator<_IteratorL>::difference_type, const std::reverse_iterator<_IteratorL>&)' 585 | operator+(typename reverse_iterator<_Iterator>::difference_type __n, | ^~~~~~~~ /usr/include/c++/11/bits/stl_iterator.h:585:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1866:50: note: mismatched types 'const std::reverse_iterator<_IteratorL>' and 'int' 1866 | std::__insertion_sort(__first, __first + int(_S_threshold), __comp); | ~~~~~~~~^~~~~~~~~~~~~~~~~~~ In file included from /usr/include/c++/11/bits/stl_algobase.h:67, from /usr/include/c++/11/bits/specfun.h:45, from /usr/include/c++/11/cmath:1935, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41, from elephants.cpp:2: /usr/include/c++/11/bits/stl_iterator.h:1700:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename std::move_iterator<_IteratorL>::difference_type, const std::move_iterator<_IteratorL>&)' 1700 | operator+(typename move_iterator<_Iterator>::difference_type __n, | ^~~~~~~~ /usr/include/c++/11/bits/stl_iterator.h:1700:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/11/string:52, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/stl_algo.h:1866:50: note: mismatched types 'const std::move_iterator<_IteratorL>' and 'int' 1866 | std::__insertion_sort(__first, __first + int(_S_threshold), __comp); | ~~~~~~~~^~~~~~~~~~~~~~~~~~~ In file included from /usr/include/c++/11/string:55, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from elephants.cpp:2: /usr/include/c++/11/bits/basic_string.h:6095:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&, const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&)' 6095 | operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, | ^~~~~~~~ /usr/include/c++/11