Submission #558122

#	Time	Username	Problem	Language	Result	Execution time	Memory
558122		imalcok	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1 ms	304 KiB

shoes

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

using namespace std;

long long count_swaps(std::vector<int> S){
    long long c = 0;
    int g[S.size()] = {0};
    for (int i = 0; i < S.size(); i++)
    {
        if (g[i]) continue;
        else if (S[i] < 0){
            int j = i+1;
            while (S[j] != (-1)*S[i] || g[j]) j++;
            g[j] = 1;
            c += (long long)(j-i-1); 
        }
        else
        {
            int j = i+1;
            while(S[j] != (-1)*S[i] || g[j]) j++;
            g[j] = 1;
            c += (long long)(j-i);
        }
    }
    return c;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:9:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for (int i = 0; i < S.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