Submission #1047251

#	Time	Username	Problem	Language	Result	Execution time	Memory
1047251		Onur_Ilgaz	Arranging Shoes (IOI19_shoes)	C++17	0 / 100	0 ms	348 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;

long long count_swaps(std::vector<int> s) {
	map <int, stack<int> > mp;
	int ans = 0;
	for(int i = 0; i < s.size(); i++) {
		if(!mp[-s[i]].empty()) {
			ans += (i - mp[-s[i]].top());
			mp[-s[i]].pop();
		}
		else {
			mp[s[i]].push(i);
		}
	}
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:8:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |  for(int i = 0; i < s.size(); i++) {
      |                 ~~^~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15