제출 #531230

#제출 시각아이디문제언어결과실행 시간메모리
531230makanhuliaArranging Shoes (IOI19_shoes)C++17
25 / 100
19 ms1868 KiB
#include <bits/stdc++.h>
using namespace std;
int64_t count_swaps(vector<int> s)
{
  if(s.size()==2)
  {
    if(s[1]<0)
    {
      return 1;
    }
    else
    {
      return 0;
    }
  }
  else
  {
    int64_t x=(int64_t)s.size()/2;
    return (x)*(x-1)/2;
  }
}
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