View Code of Problem 3686

#include<stdio.h>
#include<string.h>
int a[1000000],b[1000000];
int main(){
	int i,n,x,t;

	scanf("%d",&t);
	while(t--)
	{
		scanf("%d%d",&n,&x);
		memset(b,0,sizeof(b));
		for(i=0;i<n;i++)
		{
			scanf("%d",&a[i]);
			b[a[i]]++;
		}
		for(i=0;i<n;i++)
		{
			if(x>a[i])
			{
			if (x!=(2*a[i]) && b[x-a[i]]!=0)
			{
				printf("YES\n");
				break;
			}
			else if ( b[x-a[i]]>=2)
			{
				printf("YES\n");
				break;
			}
			}
		}

		if (i==n)
			printf("NO\n");		
	}

	return 0;
}

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