Submission #219760

#	Time	Username	Problem	Language	Result	Execution time	Memory
219760		VEGAnn	Arranging Shoes (IOI19_shoes)	C++14	25 / 100	38 ms	3200 KiB

shoes

#include <bits/stdc++.h>
#include "shoes.h"
#define all(x) x.begin(),x.end()
#define PB push_back
#define sz(x) ((int)x.size())
using namespace std;
typedef long long ll;
const int N = 100100;

long long count_swaps(std::vector<int> s) {
	if (sz(s) == 2) {
        if (s[0] > 0)
            return 1;
        else return 0;
	} else {
        ll n = sz(s) / 2;

        return n * (n - 1ll) / 2ll;
	}
}

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