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  1. #include <iostream>
  2. #include <string>
  3. #include <random>
  4.  
  5. void swap(char &a, char &b) { char t = a; a = b; b = t; }
  6.  
  7. bool isSorted(std::string str) {
  8.   bool ret = true;
  9.   for (int i = 0; i < str.size() - 1; i++)
  10.     if (str[i] > str[i + 1]) {
  11.       ret = false;
  12.       break;
  13.     }
  14.   return ret;
  15. }
  16.  
  17. void bogosort(std::string &str, int seed) {
  18.   std::mt19937 MT(seed);
  19.   while (!isSorted(str)) {
  20.     /*Fisher?Yates shuffle */
  21.     for (int n = str.size(); n > 0; --n) {
  22.       int r = MT() % n;
  23.       swap(str[r], str[n - 1]);
  24.     }
  25.   }
  26. }
  27.  
  28. int const seed = 31415926;
  29. int main() {
  30.   std::string str = "lkjihgfedcba";
  31.   bogosort(str, seed);
  32.   std::cout << str << std::endl;
  33.   return 0;
  34. }
  35.  
Success #stdin #stdout 1.34s 16064KB
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stdin
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Standard input is empty
stdout
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abcdefghijkl
https://ideone.com/WGZ2WG
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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