| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 251928 | 2020-07-23T06:36:27 Z | kartel | Poklon (COCI17_poklon7) | C++14 | 컴파일 오류 |
0 ms | 0 KB |
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,nso-stack-protector,unroll-loops,fast-math,-O3")
#define F first
#define S second
#define pb push_back
#define N +1000500
#define M ll(1e9 + 7)
#define sz(x) (int)x.size()
#define re return
#define oo ll(1e9)
#define el '\n'
#define Max_A int(1e9)
//#define el endl
#define pii pair <int, int>
#define psi pair <string, int>
#define err ld(1e-9)
#define Max_S int(3e6)
#define last(x) x.back()
#define all(x) (x).begin(), (x).end()
#define arr_all(x, n) (x + 1), (x + 1 + n)
using namespace std;
//using namespace __gnu_pbds;
//typedef tree <int, null_type, less_equal <int> , rb_tree_tag, tree_order_statistics_node_update> ordered_set;
typedef long long ll;
typedef long double ld;
pair <pair <int, int>, pair <int, int> > f[N];
int i, n;
psi umax(psi a, psi b)
{
if (sz(a.F) + a.S > sz(b.F) + b.S) return a;
if (sz(a.F) + a.S < sz(b.F) + b.S) return b;
string na = a.F, nb = b.F;
while (sz(na) < sz(nb)) na += "0";
while (sz(na) > sz(nb)) nb += "0";
int i = 0;
while (i < sz(na) && na[i] == nb[i]) i++;
if (i == sz(na)) return a;
if (na[i] > nb[i]) return a;
else return b;
}
psi upd(psi x)
{
x.S++;
return x;
}
string bin(ll x)
{
string ans = "";
while (x)
{
if (x & 1)
ans += "1";
else ans += "0";
//ans += char('0' + x & 1);
x >>= 1;
}
reverse(all(ans));
return ans;
}
psi rec(ll v)
{
psi lF;
psi rF;
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
if (f[v].S > 0) rF = rec(f[v].S); else rF = {bin(-f[v].S), 0};
return upd(umax(lF, rF));
}
string restore(psi x)
{
string ans = x.F;
for (int i = 0; i < x.S; i++) ans += "0";
return ans;
}
int main()
{
cout.precision(2);
srand(time(0));
ios_base::sync_with_stdio(0);
iostream::sync_with_stdio(0);
ios::sync_with_stdio(0);
cin.tie(NULL);
cout.tie(NULL);
// in("input.txt");
// out("output.txt");
cin >> n;
for (i = 1; i <= n; i++)
{
int l, r;
cin >> l >> r;
f[i] = {l, r};
}
cout << restore(rec(1)) << el;
}
//
//00000
//00110
//00111
//00011
//00000
Compilation message
poklon.cpp: In function 'std::pair<std::__cxx11::basic_string<char>, int> rec(ll)':
poklon.cpp:80:16: error: no match for 'operator>' (operand types are 'std::pair<int, int>' and 'int')
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
~~~~~~~^~~
In file included from /usr/include/c++/7/regex:62:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
from poklon.cpp:1:
/usr/include/c++/7/bits/regex.h:995:5: note: candidate: template<class _BiIter> bool std::__cxx11::operator>(const std::__cxx11::sub_match<_BiIter>&, const std::__cxx11::sub_match<_BiIter>&)
operator>(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
^~~~~~~~
/usr/include/c++/7/bits/regex.h:995:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/regex:62:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
from poklon.cpp:1:
/usr/include/c++/7/bits/regex.h:1056:5: note: candidate: template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator>(std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const std::__cxx11::sub_match<_BiIter>&)
operator>(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
^~~~~~~~
/usr/include/c++/7/bits/regex.h:1056:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/regex:62:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
from poklon.cpp:1:
/usr/include/c++/7/bits/regex.h:1136:5: note: candidate: template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator>(const std::__cxx11::sub_match<_BiIter>&, std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)
operator>(const sub_match<_Bi_iter>& __lhs,
^~~~~~~~
/usr/include/c++/7/bits/regex.h:1136:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/regex:62:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
from poklon.cpp:1:
/usr/include/c++/7/bits/regex.h:1210:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator>(const typename std::iterator_traits<_Iter>::value_type*, const std::__cxx11::sub_match<_BiIter>&)
operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
^~~~~~~~
/usr/include/c++/7/bits/regex.h:1210:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/regex:62:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
from poklon.cpp:1:
/usr/include/c++/7/bits/regex.h:1284:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator>(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)
operator>(const sub_match<_Bi_iter>& __lhs,
^~~~~~~~
/usr/include/c++/7/bits/regex.h:1284:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/regex:62:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
from poklon.cpp:1:
/usr/include/c++/7/bits/regex.h:1364:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator>(const typename std::iterator_traits<_Iter>::value_type&, const std::__cxx11::sub_match<_BiIter>&)
operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
^~~~~~~~
/usr/include/c++/7/bits/regex.h:1364:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/regex:62:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
from poklon.cpp:1:
/usr/include/c++/7/bits/regex.h:1444:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator>(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)
operator>(const sub_match<_Bi_iter>& __lhs,
^~~~~~~~
/usr/include/c++/7/bits/regex.h:1444:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/future:39:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:105,
from poklon.cpp:1:
/usr/include/c++/7/thread:293:3: note: candidate: bool std::operator>(std::thread::id, std::thread::id)
operator>(thread::id __x, thread::id __y) noexcept
^~~~~~~~
/usr/include/c++/7/thread:293:3: note: no known conversion for argument 1 from 'std::pair<int, int>' to 'std::thread::id'
In file included from /usr/include/c++/7/forward_list:38:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:104,
from poklon.cpp:1:
/usr/include/c++/7/bits/forward_list.h:1406:5: note: candidate: template<class _Tp, class _Alloc> bool std::operator>(const std::forward_list<_Tp, _Alloc>&, const std::forward_list<_Tp, _Alloc>&)
operator>(const forward_list<_Tp, _Alloc>& __lx,
^~~~~~~~
/usr/include/c++/7/bits/forward_list.h:1406:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::forward_list<_Tp, _Alloc>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
from poklon.cpp:1:
/usr/include/c++/7/valarray:1187:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__greater, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__greater, _Tp>::result_type> std::operator>(const _Tp&, const std::valarray<_Tp>&)
_DEFINE_BINARY_OPERATOR(>, __greater)
^
/usr/include/c++/7/valarray:1187:1: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: mismatched types 'const std::valarray<_Tp>' and 'int'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
from poklon.cpp:1:
/usr/include/c++/7/valarray:1187:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__greater, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__greater, _Tp>::result_type> std::operator>(const std::valarray<_Tp>&, const _Tp&)
_DEFINE_BINARY_OPERATOR(>, __greater)
^
/usr/include/c++/7/valarray:1187:1: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::valarray<_Tp>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
from poklon.cpp:1:
/usr/include/c++/7/valarray:1187:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__greater, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__greater, _Tp>::result_type> std::operator>(const std::valarray<_Tp>&, const std::valarray<_Tp>&)
_DEFINE_BINARY_OPERATOR(>, __greater)
^
/usr/include/c++/7/valarray:1187:1: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::valarray<_Tp>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/valarray:592:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
from poklon.cpp:1:
/usr/include/c++/7/bits/valarray_after.h:417:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__greater, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
_DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
^
/usr/include/c++/7/bits/valarray_after.h:417:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/valarray:592:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
from poklon.cpp:1:
/usr/include/c++/7/bits/valarray_after.h:417:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__greater, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)
_DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
^
/usr/include/c++/7/bits/valarray_after.h:417:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/valarray:592:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
from poklon.cpp:1:
/usr/include/c++/7/bits/valarray_after.h:417:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__greater, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
_DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
^
/usr/include/c++/7/bits/valarray_after.h:417:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/valarray:592:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
from poklon.cpp:1:
/usr/include/c++/7/bits/valarray_after.h:417:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__greater, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)
_DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
^
/usr/include/c++/7/bits/valarray_after.h:417:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/valarray:592:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
from poklon.cpp:1:
/usr/include/c++/7/bits/valarray_after.h:417:5: note: candidate: template<class _Dom1, class _Dom2> std::_Expr<std::_BinClos<std::__greater, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)
_DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
^
/usr/include/c++/7/bits/valarray_after.h:417:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/stack:61:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:89,
from poklon.cpp:1:
/usr/include/c++/7/bits/stl_stack.h:323:5: note: candidate: template<class _Tp, class _Seq> bool std::operator>(const std::stack<_Tp, _Seq>&, const std::stack<_Tp, _Seq>&)
operator>(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
^~~~~~~~
/usr/include/c++/7/bits/stl_stack.h:323:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::stack<_Tp, _Seq>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/set:62:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:87,
from poklon.cpp:1:
/usr/include/c++/7/bits/stl_multiset.h:927:5: note: candidate: template<class _Key, class _Compare, class _Alloc> bool std::operator>(const std::multiset<_Key, _Compare, _Alloc>&, const std::multiset<_Key, _Compare, _Alloc>&)
operator>(const multiset<_Key,_Compare,_Alloc>& __x,
^~~~~~~~
/usr/include/c++/7/bits/stl_multiset.h:927:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::multiset<_Key, _Compare, _Alloc>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/set:61:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:87,
from poklon.cpp:1:
/usr/include/c++/7/bits/stl_set.h:944:5: note: candidate: template<class _Key, class _Compare, class _Alloc> bool std::operator>(const std::set<_Key, _Compare, _Alloc>&, const std::set<_Key, _Compare, _Alloc>&)
operator>(const set<_Key, _Compare, _Alloc>& __x,
^~~~~~~~
/usr/include/c++/7/bits/stl_set.h:944:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::set<_Key, _Compare, _Alloc>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/queue:64:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:86,
from poklon.cpp:1:
/usr/include/c++/7/bits/stl_queue.h:348:5: note: candidate: template<class _Tp, class _Seq> bool std::operator>(const std::queue<_Tp, _Seq>&, const std::queue<_Tp, _Seq>&)
operator>(const queue<_Tp, _Seq>& __x, const queue<_Tp, _Seq>& __y)
^~~~~~~~
/usr/include/c++/7/bits/stl_queue.h:348:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::queue<_Tp, _Seq>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/vector:64:0,
from /usr/include/c++/7/queue:61,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:86,
from poklon.cpp:1:
/usr/include/c++/7/bits/stl_vector.h:1626:5: note: candidate: template<class _Tp, class _Alloc> bool std::operator>(const std::vector<_Tp, _Alloc>&, const std::vector<_Tp, _Alloc>&)
operator>(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
^~~~~~~~
/usr/include/c++/7/bits/stl_vector.h:1626:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::vector<_Tp, _Alloc>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/memory:81:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:82,
from poklon.cpp:1:
/usr/include/c++/7/bits/shared_ptr.h:449:5: note: candidate: template<class _Tp> bool std::operator>(std::nullptr_t, const std::shared_ptr<_Tp>&)
operator>(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
^~~~~~~~
/usr/include/c++/7/bits/shared_ptr.h:449:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: mismatched types 'const std::shared_ptr<_Tp>' and 'int'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/memory:81:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:82,
from poklon.cpp:1:
/usr/include/c++/7/bits/shared_ptr.h:444:5: note: candidate: template<class _Tp> bool std::operator>(const std::shared_ptr<_Tp>&, std::nullptr_t)
operator>(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
^~~~~~~~
/usr/include/c++/7/bits/shared_ptr.h:444:5: note: template argument deduction/substitution failed:
poklon.cpp:80:18: note: 'std::pair<int, int>' is not derived from 'const std::shared_ptr<_Tp>'
if (f[v].S > 0) lF = rec(f[v].F); else lF = {bin(-f[v].F), 0};
^
In file included from /usr/include/c++/7/memory:81:0,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:82,