제출 #143308

#제출 시각아이디문제언어결과실행 시간메모리
143308VladaMG98Arranging Shoes (IOI19_shoes)C++17
15 / 100
33 ms1916 KiB
#include "shoes.h"

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