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  1. #include <iostream>
  2. #include <iterator>
  3. #include <algorithm>
  4. #include <vector>
  5. #include <functional>
  6.  
  7. const int e_key = 47;
  8. const int d_key = 15;
  9. const int n = 391;
  10.  
  11. struct do_crypt : std::binary_function<int, int, int> {
  12.     int operator()(int input, int key) const { 
  13.         int result = 1;
  14.         for (int i=0; i<key; i++) {
  15.             result *= input;
  16.             result %= n;
  17.         }
  18.         return result;
  19.     }
  20. };
  21.  
  22. int main() {
  23.     std::string msg = "Drink more Ovaltine.";
  24.     std::vector<int> encrypted;
  25.  
  26.     std::transform(msg.begin(), msg.end(),  
  27.         std::back_inserter(encrypted),
  28.         std::bind2nd(do_crypt(), e_key));
  29.  
  30.     std::transform(encrypted.begin(), encrypted.end(), 
  31.         std::ostream_iterator<char>(std::cout, ""), 
  32.         std::bind2nd(do_crypt(), d_key));
  33.     std::cout << "\n";
  34.  
  35.     return 0;
  36. }
  37.  
Success #stdin #stdout 0s 3060KB
comments (?)
stdin 
Standard input is empty
stdout 
Drink more Ovaltine.
https://ideone.com/vFTg9Q
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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