fork download 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int main() {
  4.     unordered_map<int,int> mp ;
  5.     vector<int> ans ;
  6.     mp[0] = 1 ;
  7.     mp[1] = 1 ;
  8.     mp[2] = 1 ;
  9.     mp[3] = 1 ;
  10. 	cout<<"map size is "<<mp.size()<<endl ;
  11.     for(auto e:mp){
  12.  
  13.         if(e.second == 1)
  14.          { 
  15.              ans.push_back(e.first) ;
  16.              mp.erase(e.first) ;
  17.          }
  18.         else 
  19.            e.second-- ;
  20.     }
  21.     cout<<"map size is "<<mp.size()<<endl ;
  22.     for(int i=0 ; i<ans.size();i++) cout<<ans[i]<<endl ;
  23.     return 0 ;
  24.  }
  25.  
Success #stdin #stdout 0s 5692KB
comments (?)
stdin 
Standard input is empty
stdout 
map size is 4
map size is 3
3
https://ideone.com/oPgJSM
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!