Submission #414651

#	Time	Username	Problem	Language	Result	Execution time	Memory
414651		hibye1217	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

/* shoes */

#ifndef NOTSUBMIT
#include "shoes.h"
#endif

int psh(std::vector<int>& s, int st, int ed){
	int res = 0;
	for (int j = st; j > ed; j--){
		swap(s[j], s[j-1]);
		res += 1;
	}
	return res;
}

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

Compilation message (stderr)

shoes.cpp: In function 'int psh(std::vector<int>&, int, int)':
shoes.cpp:10:3: error: 'swap' was not declared in this scope
   10 |   swap(s[j], s[j-1]);
      |   ^~~~
shoes.cpp:10:3: note: suggested alternatives:
In file included from /usr/include/c++/10/vector:68,
                 from shoes.h:5,
                 from shoes.cpp:4:
/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:4:
/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:4:
/usr/include/c++/10/bits/exception_ptr.h:169:5: note:   'std::__exception_ptr::swap'
  169 |     swap(exception_ptr& __lhs, exception_ptr& __rhs)
      |     ^~~~
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:25:23: error: 'swap' was not declared in this scope
   25 |   if (s[i] > s[i+1]){ swap(s[i], s[i+1]); ans += 1; }
      |                       ^~~~
shoes.cpp:25:23: note: suggested alternatives:
In file included from /usr/include/c++/10/vector:68,
                 from shoes.h:5,
                 from shoes.cpp:4:
/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:4:
/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:4:
/usr/include/c++/10/bits/exception_ptr.h:169:5: note:   'std::__exception_ptr::swap'
  169 |     swap(exception_ptr& __lhs, exception_ptr& __rhs)
      |     ^~~~