Submission #808635

#	Time	Username	Problem	Language	Result	Execution time	Memory
808635		KemalK	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1 ms	300 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
int n;
long long count_swaps(std::vector<int> s) {
	n = s.size();
	if (n == 2){
		if (s[0] < 0){
			return 0;
		}
		return 1;
	}
	map <int, vector<int>> pos_right;
	map <int, vector<int>> pos_left;
	for (int i = 0; i < n; i++){
		if (s[i] > 0){
			pos_right[s[i]].push_back(i);
		}
		else{
			pos_left[s[i]].push_back(i);
		}
	}
	ll ans = 0;
	for (auto x: pos_right){
		for (int i = 0; i < x.second.size(); i++){
			if (x.second[i] > pos_left[-x.first][i]){
				ans += x.second[i] - pos_left[-x.first][i] - 1ll;
			}
			else{
				ans += abs(x.second[i] - pos_left[-x.first][i]);
			}	
		}
	}
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:26:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   for (int i = 0; i < x.second.size(); i++){
      |                   ~~^~~~~~~~~~~~~~~~~

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