Geeksforgeeks Solution For " Key Pair "

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Problem :- Key Pair

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Solution :- 

#include <iostream>
using namespace std;

int main() {
int t;
cin>>t;
while(t--){
   int n,x;
   cin>>n>>x;
   int a[n];
   for(int i=0; i<n; i++)
       cin>>a[i];
   int key=0;
   for(int i=0; i<n-1; i++)
       for(int j=i+1; j<n; j++){
           if((a[i]+a[j])==x){
               key=1;
               break;
           }
       }
       
   
   if(key)
       cout<<"Yes"<<endl;
   else
       cout<<"No"<<endl;
}
return 0;
}

Output:-