제출 #523830

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
523830		pakhomovee	Arranging Shoes (IOI19_shoes)	C++17	컴파일 에러	0 ms	0 KiB

shoes

#include "shoes.h"
#include <cmath>

long long count_swaps(std::vector<int> s) {
    const int n = s.size();
    long long ans = 0;
    for (int i = 0; i < n * 2; i += 2) {
        int j;
        for (j = i + 1; abs(s[j]) != abs(s[i]); ++j) {
            if (s[j] != 0) {
                ++ans;
            }
        }
        for (int q = j; q > i + 1; --q) {
            swap(s[q], s[q - 1]);
        }
        if (s[i] > 0) {
            ++ans;
        }
    }
    return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:15:13: error: 'swap' was not declared in this scope
   15 |             swap(s[q], s[q - 1]);
      |             ^~~~
shoes.cpp:15:13: note: suggested alternatives:
In file included from /usr/include/c++/10/vector:68,
                 from shoes.h:5,
                 from shoes.cpp:1:
/usr/include/c++/10/bits/stl_bvector.h:134:3: note:   'std::swap'
  134 |   swap(bool& __x, _Bit_reference __y) noexcept
      |   ^~~~
In file included from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/vector:60,
                 from shoes.h:5,
                 from shoes.cpp:1:
/usr/include/c++/10/bits/move.h:189:5: note:   'std::swap'
  189 |     swap(_Tp& __a, _Tp& __b)
      |     ^~~~
/usr/include/c++/10/bits/move.h:189:5: note:   'std::swap'
In file included from /usr/include/c++/10/exception:147,
                 from /usr/include/c++/10/new:41,
                 from /usr/include/c++/10/ext/new_allocator.h:33,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/c++allocator.h:33,
                 from /usr/include/c++/10/bits/allocator.h:46,
                 from /usr/include/c++/10/vector:64,
                 from shoes.h:5,
                 from shoes.cpp:1:
/usr/include/c++/10/bits/exception_ptr.h:169:5: note:   'std::__exception_ptr::swap'
  169 |     swap(exception_ptr& __lhs, exception_ptr& __rhs)
      |     ^~~~