View Code of Problem 133

#include<iostream>
#include<algorithm>
using namespace std;
int main(void){
	int t;
	cin>>t;
	while(t--){
		int n,x,i=0,j=0,flag=0;
		cin>>n>>x;
		int a[n];
		for(i=0;i<n;i++){
			cin>>a[i];
		}
		sort(a,a+n);
		i=0;j=n-1;
		while(i<j){
			if(a[i]+a[j]<x){
				i++;
			}
			if(a[i]+a[j]>x){
				j--;
			}
			if(a[i]+a[j]==x){
				flag=1;
				break;
			}
		}
		if(flag) cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
}