Submission #909918

#	Time	Username	Problem	Language	Result	Execution time	Memory
909918		vjudge1	Arranging Shoes (IOI19_shoes)	C++17	25 / 100	16 ms	3164 KiB

shoes

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using pii = pair<int, int>;

ll count_swaps(vector<int> shoes) {
  if (shoes.size() == 2)
    return shoes[0] > shoes[1];

  ll swaps = 0;

  int n = (shoes.size() + 1) / 2;
  for (int i = 1; i < n; i++)
    swaps += n - i;

  return swaps;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 15 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15