Submission #312476

#	Time	Username	Problem	Language	Result	Execution time	Memory
312476		Nayna	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	512 KiB

shoes

#include "shoes.h"
using namespace std;
typedef long long ll;
int used[100005];

long long count_swaps(vector<int> s)
{
    int ans = 0;
    int n = s.size();
    for(int i = 0; i < n; i++)
    {
        if(used[i]) continue;
        int idx = -1;
        for(int r = i+1; r < n; r++)
        {
            if(s[r]==(-1*s[i]))
            {
                idx = r;
                break;
            }
        }
        int cnt = 0;
        while(idx-1!=i)
        {
            swap(s[idx], s[idx-1]);
            idx--;
            cnt++;
        }
        if(s[idx]<s[idx-1])
        {
            swap(s[idx], s[idx-1]);
            idx--;
            cnt++;
        }
        ans+=cnt;
        used[idx] = 1;
        used[idx+1] = 1;
    }
    return ans;
}

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