Submission #465361

#	Time	Username	Problem	Language	Result	Execution time	Memory
465361		aris12345678	Arranging Shoes (IOI19_shoes)	C++14	25 / 100	24 ms	3120 KiB

shoes

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

typedef long long ll;

const int mxN = 100005;

ll count_swaps(vector<int> s) {
    int n = int(s.size());
    if(n == 2) {
        if(s[0] > 0)
            return 1;
        return 0;
    } else {
        n /= 2;
        n--;
        return 1LL*n*(n+1)/2;
    }
    assert(true);
}

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