Submission #1030182

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030182		ender	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1096 ms	3264 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>

using namespace std;

long long count_swaps(std::vector<int> s) {

	long long ans = 0;

	for(int i = 0; i < s.size(); ++i){

		if(i%2 == 0){ // debe ser zapato izquierdo

			if(s[i] < 0) continue;

			for(int j = i+1; j < s.size(); ++j){

				if(s[j] < 0){

					for(int k = j; k > i; --k){

						swap(s[k], s[k-1]);
						ans++;

					}

					break;

				}

			}

		}else { // debe ser zapato derecho

			if(s[i] == s[i-1] * -1) continue;

			int target = s[i-1] * -1;

			for(int j = i+1; j < s.size(); ++j){

				if(s[j] == target){

					for(int k = j; k > i; --k){

						swap(s[k], s[k-1]);
						ans++;

					}

					break;

				}

			}


		}

	}
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:10:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |  for(int i = 0; i < s.size(); ++i){
      |                 ~~^~~~~~~~~~
shoes.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |    for(int j = i+1; j < s.size(); ++j){
      |                     ~~^~~~~~~~~~
shoes.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |    for(int j = i+1; j < s.size(); ++j){
      |                     ~~^~~~~~~~~~

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