Submission #143499

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
143499	2019-08-14 11:37:15	muradeyn	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1053 ms	2040 KiB

shoes

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#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
long long count_swaps(vector<int> s) {
  long long ret = 0;
  int n = s.size();
  for (int i = 0;i<n;i+=2) {
        if (s[i] != -s[i + 1]) {
            int fn;
            for (int j = i + 2;j < n;j++) {
                if (s[j] == -s[i]) {
                    fn = j;
                    break;
                }
            }
            while (fn != i + 1) {
                ret++;
                swap(s[fn] , s[fn - 1]);
                fn--;
            }
        }
        if (s[i] > s[i + 1]) {
            ret++;
            swap(s[i] , s[i + 1]);
        }
  }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:13:17: warning: 'fn' may be used uninitialized in this function [-Wmaybe-uninitialized]
             int fn;
                 ^~

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