Submission #12778

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
12778	2015-01-03 12:37:11	gs13068	양말 찾기 (KPI13_socks)	C++98	1 / 1	1948 ms	1600 KiB

socks

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#include<cstdio>
int d[2][65536];
int main()
{
    int i,a,b;
    scanf("%*d");
    while(~scanf("%d",&i))
  {
    i+=(1<<30);
        d[0][i>>16]^=i;
        d[1][i&65535]^=i;
  }
  a=b=0;
  for(i=0;i<65536;i++)if(d[0][i])
  {
        if(a)b=d[0][i];
        else a=d[0][i];
  }
  if(!b)
  {
    a=b=0;
    for(i=0;i<65536;i++)if(d[1][i])
    {
      if(a)b=d[1][i];
      else a=d[1][i];
    }
  }
  if(a>b)a^=b^=a^=b;
 
 
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• Subtask 1: 1 / 1