Submission #303562

#	Time	Username	Problem	Language	Result	Execution time	Memory
303562		vipghn2003	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1082 ms	3064 KiB

shoes

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

const int N=1e5+5;

long long count_swaps(vector<int>a)
{
    int n=a.size();
    long long res=0;
    for(int i=0;i<n;i+=2)
    {
        int id;
        for(int j=2;j<=n;j++)
        {
            if(a[j]==-a[i])
            {
                id=j;
                break;
            }
        }
        for(int j=id;j>i+1;j--)
        {
            res++;
            swap(a[j],a[j-1]);
        }
        if(a[i]>0) res++;
    }
    return res;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:13:13: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized]
   13 |         int id;
      |             ^~

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