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  1. #include <iostream>
  2.  
  3. using namespace std;
  4. bool check[26] {};
  5. char input[200005];
  6.  
  7. int main()
  8. {
  9.     char in;
  10.     int n, k,count = 0,sum = 0; cin >> n >> k;
  11.     for(int i = 0 ; i < n; ++i)
  12.         cin >> input[i];
  13.     for (int i = 0; i < k;++i)
  14.     {
  15.         cin >> in;
  16.         check[in - 'a'] = 1;
  17.     }
  18.  
  19.     for(int i = 0;i < n ;++i)
  20.     {
  21.         if(check[input[i] - 'a'])
  22.         {
  23.             ++count;
  24.             if(n == (i + 1))
  25.                 sum += ((count * (count + 1)) / 2); 
  26.         }
  27.         else
  28.         {
  29.             sum += ((count * (count + 1)) / 2);
  30.             count = 0;
  31.         }
  32.  
  33.     }
  34.     cout << sum; 
  35.  
  36. }
Success #stdin #stdout 0s 5308KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/GuJwtr
language:
C++ (gcc 8.3)
created:
21 days ago
visibility:
public

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