제출 #282682

#제출 시각아이디문제언어결과실행 시간메모리
282682medmdgArranging Shoes (IOI19_shoes)C++14
15 / 100
34 ms3192 KiB
#include <bits/stdc++.h>

using namespace std;
long long count_swaps(std::vector<int> S){
    long long int ans=S.size()/2;
    return (ans*(ans-1))/2;
}
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