#include <iostream> #include <algorithm> #include<cstring> using namespace std; const int maxn = 0x7ffffff; int flag[maxn] = {0}; int main() { int t; cin >> t; int n,x; while (t--){ cin >> n >> x; int a[n] = {0}; memset(flag,0,sizeof(flag)); for(int i = 0; i < n; i++){ cin >> a[i]; flag[a[i]]++; } for(int i = 0; i < n; i++){ if (x != 2 * a[i]){ if(flag[x-a[i]] == 1) { cout << "YES"<<endl; break; } else{ cout << "NO"<<endl; break; } } else{ if(flag[x-a[i]] > 1){ cout << "YES"<<endl; break; } else{ cout <<"NO" <<endl; break; } } } } return 0; } |
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