Submission #144528

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
144528	2019-08-17 04:45:51	MohamedAhmed04	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1082 ms	2040 KiB

shoes

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#include "shoes.h"
#include <bits/stdc++.h>
using namespace std ;
long long count_swaps(vector<int> v) 
{
  int ans = 0 ;
  for(int i = 0 ; i < v.size() ; ++i)
  {
    if(i&1)
      continue ;
    int idx ;
    for(int j = i+1 ; j < v.size() ; ++j)
    {
      if(v[j] == -v[i])
      {
        idx = j ;
        break ;
      }
    }
    for(int j = idx-1 ; j > i ; --j)
    {
      swap(v[j], v[j+1]) ;
      ans++ ;
    }
    if(v[i] > 0)
      swap(v[i], v[i+1]), ans++ ;
  }
  return ans ;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:9:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0 ; i < v.size() ; ++i)
                  ~~^~~~~~~~~~
shoes.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j = i+1 ; j < v.size() ; ++j)
                     ~~^~~~~~~~~~
shoes.cpp:13:7: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int idx ;
       ^~~

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