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  1. #include<iostream>
  2. #include<unordered_map>
  3. using namespace std;
  4.  
  5. int main(){
  6.  
  7.     int n; 
  8.     cin>>n;
  9.  
  10.     int arr[n];
  11.     for(int i=0; i<n; i++){
  12.         cin>>arr[i];
  13.     }
  14.  
  15.     unordered_map<int, int> mp;
  16.  
  17.     for(int i=0; i<n; i++){
  18.         mp[arr[i]]++;
  19.     }
  20.  
  21.  
  22.     for(auto x: mp){
  23.         cout<<x.first<<": "<<x.second<<endl;
  24.     }
  25.  
  26.     return 0;
  27. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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5
1 2 1 2 1
stdout
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2: 2
1: 3
https://ideone.com/fH4Z1h
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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