제출 #650144

#제출 시각아이디문제언어결과실행 시간메모리
650144activedeltorreArranging Shoes (IOI19_shoes)C++14
0 / 100
1 ms212 KiB
#include <vector>
using namespace std;
long long count_swaps(vector<int>vec)
{
    int n=vec.size();
    return n*(n-1)/2;
}   
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