View Code of Problem 133

# include <stdio.h>
#include<string.h>

int a[10000000],b[10000000];

  int main()
  {
	  int i,t,n,x;
	  scanf("%d",&t);
	  while(t--)
	  {
	  memset(b,0,sizeof(b));
		  scanf("%d%d",&n,&x);
	  for(i=1;i<=n;i++)
	  {
		  scanf("%d",&a[i]);
		  b[a[i]]=i;
	  }
	  for(i=1;i<=n;i++)
	  {
		  if(b[x-a[i]]!=0)
		  {
			  printf("YES\n");
			  break;
		  }
	  }
	  if(i==n+1)	printf("NO\n");
  }
  }