제출 #397697

#제출 시각아이디문제언어결과실행 시간메모리
397697ly20Arranging Shoes (IOI19_shoes)C++17
15 / 100
30 ms3128 KiB
#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
long long count_swaps(vector<int> s) {
	int n = s.size();
	long long pr = n / 2;
	return (pr * (pr - 1))/2;
}
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