Submission #368102

#	Time	Username	Problem	Language	Result	Execution time	Memory
368102		leinad2	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1094 ms	1900 KiB

shoes

#include "shoes.h"
#include<bits/stdc++.h>
using namespace std;
long long count_swaps(vector<int>s)
{
    long long ans=0;
    int i, j;
    for(i=0;i<s.size();i+=2)
    {
        for(j=i+1;j<s.size();j++)
        {
            if(s[j]==-s[i])break;
        }
        while(j>i+1)
        {
            swap(s[j-1], s[j]);
            ans++;
            j--;
        }
        if(s[i]>0)ans++;
    }
    return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:8:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(i=0;i<s.size();i+=2)
      |             ~^~~~~~~~~
shoes.cpp:10:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         for(j=i+1;j<s.size();j++)
      |                   ~^~~~~~~~~

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