View Code of Problem 3686

#include<iostream>
#include<cstring>
using namespace std;
int a[10000000],b[10000000] = { 0 };

int main() {
	int t, n, x;
	cin >> t;
	while (t--) {
		//int b[10000000] = { 0 };
		//memset(b, 0, sizeof(b));
		cin >> n >> x;
		for (int i = 0; i < n; i++)
		{
			cin >> a[i];
			b[a[i]]++;
		}
		int flag = 0;
		for (int i = 0; i < n; i++) {
                 if(x>a[i]) {
			if (b[x - a[i]] != 0&&x!=2*a[i]) {
				flag = 1;
				break;
			}
			else if (b[x - a[i]] >=2) {
				flag = 1;
				break;
			}
                  }
		}
		if (flag)
		{
			cout << "YES" << endl;
		}
		else cout << "NO" << endl;
	}
	return 0;
}