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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