View Code of Problem 3686

#include<iostream>

using namespace std;

int a[1000000],b[1000000]={0};

int main(){
	int i,n,x,t;
 
	scanf("%d",&t);
	while(t--)
	{
		
		scanf("%d%d",&n,&x);
		for(i=0;i<n;i++)
		{
			cin>>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)
			{
				cout<<"YES"<<endl;
				break;
			}
			else if ( b[x-a[i]]>=2)
			{
				cout<<"YES"<<endl;
				break;
			}
			}
		}
 
		if (i==n)
			cout<<"NO"<<endl;		
	}
 
	return 0;
}