Submission #1334493

#	Time	Username	Problem	Language	Result	Execution time	Memory
1334493		zhehan	Arranging Shoes (IOI19_shoes)	C++20	10 / 100	1 ms	344 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;

long long count_swaps(std::vector<int> s) {
  map<int, queue<int>> key;
  for (int i = 0; i < s.size(); ++i) {
    if (s[i] > 0) {
      key[s[i]];
      key[s[i]].push(i);
    }
  }
  int swaps = 0;
  for (int i = 0; i < s.size(); ++i) {
    if (s[i] < 0) {
      if (key[-s[i]].front() < i) {
        swaps += i - key[-s[i]].front();
      } else {
        swaps += key[-s[i]].front() - 1 - i;
      }

      key[-s[i]].pop();
    }
  }
  return swaps;
}

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