제출 #670534

#제출 시각아이디문제언어결과실행 시간메모리
670534birthdaycakeArranging Shoes (IOI19_shoes)C++17
15 / 100
18 ms3104 KiB
#include<bits/stdc++.h>
#include "shoes.h"
using namespace std;

int vs[1001];
long long count_swaps(vector<int>s) {
    long long n = s.size();
    n /= 2;
    n--;
    
    return (n * (n + 1) / 2);
}
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