Submission #1235190

#	Time	Username	Problem	Language	Result	Execution time	Memory
1235190		rhm_gan	Arranging Shoes (IOI19_shoes)	C++20	50 / 100	1095 ms	1864 KiB

shoes

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

using namespace std;

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 = 0;
		for (int j = i + 1; j < n; j++) {
			if (-a[j] == a[i]) {
				id = j;
				break;
			}
		}
		res += id - i - 1;
		for (int j = id - 1; j > i; j--) {
			swap(a[j], a[j + 1]);
		}
		if (a[i] > 0) {
			res++;
			swap(a[i], a[i + 1]);
		}
	}

	return res;
}

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