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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main() {
  4.     unordered_map<int,int> hash;
  5.     int n;
  6.     cin>>n;
  7.     int a[n];
  8.     for(int i=0;i<n;i++)
  9.     {
  10.         cin>>a[i];
  11.         hash[a[i]]=1;
  12.     }
  13.     int target;
  14.     cin>>target;
  15.     sort(a,a+n);
  16.  
  17.     for(int i=0;i<n;i++)
  18.     {
  19.         if(hash[target-a[i]]==1)
  20.         {
  21.             hash[target-a[i]]=0;
  22.             hash[a[i]]=0;
  23.             cout<<a[i]<<" and "<<target-a[i]<<endl;
  24.         }
  25.     }
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/MB2Uat
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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