제출 #1242532

#제출 시각아이디문제언어결과실행 시간메모리
1242532rdwabdellahArranging Shoes (IOI19_shoes)C++20
15 / 100
13 ms1864 KiB
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

ll count_swaps(vector<int> S){
    ll n = (ll)S.size()/2LL;
    ll ans = ((n-1)*n)/2LL;
    return ans;
}
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