Submission #152483

#	Time	Username	Problem	Language	Result	Execution time	Memory
152483		WLZ	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1083 ms	1936 KiB

shoes

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

long long count_swaps(vector<int> s) {
  long long ans = 0;
  int n = (int) s.size() / 2;
  for (int i = 0; i < n; i++) {
    int pos = i * 2;
    if (s[pos] > 0) {
      int other;
      for (int j = pos + 1; j < 2 * n; j++) {
        if (s[j] < 0) {
          other = j;
          break;
        }
      }
      for (int j = other; j > pos; j--) {
        swap(s[j], s[j - 1]);
        ans++;
      }
    }
    if (s[pos + 1] != -s[pos]) {
      int other;
      for (int j = pos + 2; j < 2 * n; j++) {
        if (s[j] == -s[pos]) {
          other = j;
          break;
        }
      }
      for (int j = other; j > pos + 1; j--) {
        swap(s[j], s[j - 1]);
        ans++;
      }
    }
  }
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:24:11: warning: 'other' may be used uninitialized in this function [-Wmaybe-uninitialized]
       int other;
           ^~~~~
shoes.cpp:11:11: warning: 'other' may be used uninitialized in this function [-Wmaybe-uninitialized]
       int other;
           ^~~~~

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