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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     int n, m, input;
  7.     long long counter = 0;
  8.  
  9.     cin >> n >> m;
  10.  
  11.     unordered_map<int, int> freq;
  12.  
  13.     for (int i = 0; i < n; i++)
  14.     {
  15.         cin >> input;
  16.         freq[input]++;
  17.     }
  18.  
  19.     for (int i = 0; i < m; i++)
  20.     {
  21.         cin >> input;
  22.         counter += freq[input];
  23.     }
  24.  
  25.     cout << counter;
  26. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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8 7
1 1 3 3 3 5 8 8
1 3 3 4 5 5 5
stdout
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11
https://ideone.com/cuPPk3
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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