View Code of Problem 133

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cctype>
#include<vector>
#include<cmath>
using namespace std;
int main(void){
	int n;
	cin>>n;
	while(n--){
		int n,x;
		cin>>n>>x;
		int arr[n];
		for(int i=0;i<n;i++)
			cin>>arr[i];
		sort(arr,arr+n);
		int flag=0;
		int low=0,high=n-1;
		while (low<high) {
			if (arr[low] + arr[high] == x) {
				flag=1;
				break;
			}
			else if(arr[low]+arr[high]>x) {
				high--;
			}
			else{
				low++;
			}
		}
		if(flag)
			cout<<"YES"<<endl;
		else
			cout<<"NO"<<endl;
	}
}