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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n,x ; cin>>n>>x;
  7. 	vector<int>arr(n);
  8. 	for(int i = 0 ; i<n;i++){
  9. 		cin>>arr[i];
  10. 	}
  11. 	unordered_map<int,int>hash;
  12. 	for(int i =0;i<n;i++){
  13. 		if(hash.find(x-arr[i])!=hash.end()){
  14. 			cout<<"pair found "<<arr[i]<<" "<<x-arr[i]<<"\n";
  15. 		}
  16. 		hash[arr[i]]=i;	}
  17. 	// your code goes here
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 5324KB
comments (?)
stdin 
5 4 
1 2 3 4 2
stdout 
pair found 3 1
pair found 2 2
https://ideone.com/a9GY11
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
public

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