Submission #1001711

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001711		codexistent	Gondola (IOI14_gondola)	C++14	Compilation error	0 ms	0 KiB

gondola

#include <iostream>
#include <set>
// #include <gondola.h>
using namespace std;
#define FOR(i, a, b) for(int i = a; i <= b; i++)

int diff(int n, int a, int b){
    if(b >= a) return b - a;
    else (n - a) + b;
}

int valid(int n, int inputSeq[]){
    pair<int, int> prev = {-1, 0};
    set<int> s;
    FOR(i, 0, n - 1){
        if(inputSeq[i] <= n){
            if(prev.first == -1){
                prev = {i, inputSeq[i]};
            }else{
                if(prev.second + diff(n, prev.first, i) != inputSeq[i]) return 0;
                prev = (i, inputSeq[i]);
            }
        }else{
            if(s.find(inputSeq[i]) != s.end()) return 0;
            s.insert(inputSeq[i]);
        }
    }
    
    return 1;
}

int replacement(int n, int gondolaSeq[], int replacementSeq[]){
    return 1;
}

int countReplacement(int n, int inputSeq[]){
    return 1;
}

int main(){
    int t, x;
    cin >> t >> x;
    const int n = x;

    int arr[n];
    FOR(i, 0, n - 1) cin >> arr[i];

    if(t <= 3) valid(x, arr);
    else if(t <= 6) {
        int rep[n];
        replacement(x, arr, rep);
    }else{
        countReplacement(x, arr);
    }
}

Compilation message (stderr)

gondola.cpp: In function 'int diff(int, int, int)':
gondola.cpp:9:18: warning: statement has no effect [-Wunused-value]
    9 |     else (n - a) + b;
      |          ~~~~~~~~^~~
gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:21:25: warning: left operand of comma operator has no effect [-Wunused-value]
   21 |                 prev = (i, inputSeq[i]);
      |                         ^
gondola.cpp:21:39: error: no match for 'operator=' (operand types are 'std::pair<int, int>' and 'int')
   21 |                 prev = (i, inputSeq[i]);
      |                                       ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/ostream:38,
                 from /usr/include/c++/10/iostream:39,
                 from gondola.cpp:1:
/usr/include/c++/10/bits/stl_pair.h:390:7: note: candidate: 'std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(typename std::conditional<std::__and_<std::is_copy_assignable<_T1>, std::is_copy_assignable<_T2> >::value, const std::pair<_T1, _T2>&, const std::__nonesuch&>::type) [with _T1 = int; _T2 = int; typename std::conditional<std::__and_<std::is_copy_assignable<_T1>, std::is_copy_assignable<_T2> >::value, const std::pair<_T1, _T2>&, const std::__nonesuch&>::type = const std::pair<int, int>&]'
  390 |       operator=(typename conditional<
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:393:41: note:   no known conversion for argument 1 from 'int' to 'std::conditional<true, const std::pair<int, int>&, const std::__nonesuch&>::type' {aka 'const std::pair<int, int>&'}
  390 |       operator=(typename conditional<
      |                 ~~~~~~~~~~~~~~~~~~~~~    
  391 |   __and_<is_copy_assignable<_T1>,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~        
  392 |          is_copy_assignable<_T2>>::value,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  393 |   const pair&, const __nonesuch&>::type __p)
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_pair.h:401:7: note: candidate: 'std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(typename std::conditional<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__nonesuch&&>::type) [with _T1 = int; _T2 = int; typename std::conditional<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__nonesuch&&>::type = std::pair<int, int>&&]'
  401 |       operator=(typename conditional<
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:404:31: note:   no known conversion for argument 1 from 'int' to 'std::conditional<true, std::pair<int, int>&&, std::__nonesuch&&>::type' {aka 'std::pair<int, int>&&'}
  401 |       operator=(typename conditional<
      |                 ~~~~~~~~~~~~~~~~~~~~~
  402 |   __and_<is_move_assignable<_T1>,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  403 |          is_move_assignable<_T2>>::value,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  404 |   pair&&, __nonesuch&&>::type __p)
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_pair.h:418:2: note: candidate: 'template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, const _U1&>, std::is_assignable<_T2&, const _U2&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(const std::pair<_U1, _U2>&) [with _U1 = _U1; _U2 = _U2; _T1 = int; _T2 = int]'
  418 |  operator=(const pair<_U1, _U2>& __p)
      |  ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:418:2: note:   template argument deduction/substitution failed:
gondola.cpp:21:39: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   21 |                 prev = (i, inputSeq[i]);
      |                                       ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/ostream:38,
                 from /usr/include/c++/10/iostream:39,
                 from gondola.cpp:1:
/usr/include/c++/10/bits/stl_pair.h:430:2: note: candidate: 'template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, _U1&&>, std::is_assignable<_T2&, _U2&&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(std::pair<_U1, _U2>&&) [with _U1 = _U1; _U2 = _U2; _T1 = int; _T2 = int]'
  430 |  operator=(pair<_U1, _U2>&& __p)
      |  ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:430:2: note:   template argument deduction/substitution failed:
gondola.cpp:21:39: note:   mismatched types 'std::pair<_T1, _T2>' and 'int'
   21 |                 prev = (i, inputSeq[i]);
      |                                       ^
gondola.cpp: In function 'int diff(int, int, int)':
gondola.cpp:10:1: warning: control reaches end of non-void function [-Wreturn-type]
   10 | }
      | ^