Submission #512562

#	Time	Username	Problem	Language	Result	Execution time	Memory
512562		terrasphere	Arranging Shoes (IOI19_shoes)	C++17	30 / 100	34 ms	3504 KiB

shoes

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

long long count_swaps(std::vector<int> s)
{
    int n=s.size();
    if(n==2)
    {
        if(s[0]>0)
            return 1;
        return 0;
    }
    int p=abs(s[0]);
    int t=1;
    for(int i=1;i<n;i++)
    {
        if(abs(s[i])!=p)
            t=0;
    }
    int arr[101010];
    int idx=0;
    if(t)
    {
        long long answer=0;
        for(int i=0;i<n;i++)
        {
            if(s[i]==p)
            {
                arr[idx]=i;
                idx++;
            }
        }
        for(int i=0;i<idx;i++)
            answer+=abs(arr[i]-2*i-1);
        return answer;
    }
    return 0;
}

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