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  1. #include <iostream>
  2. #include <random>
  3.  
  4. using namespace std;
  5.  
  6. default_random_engine rnd(random_device{}());
  7.  
  8. bool ok()
  9. {
  10.     bool win[2] = {};
  11.     uniform_int_distribution<>d(0,1);
  12.     uniform_real_distribution<>r(0.0,1.0);
  13.  
  14.     if (d(rnd))
  15.     {
  16.         win[0] = r(rnd) < 0.7;
  17.         win[1] = r(rnd) < 0.6;
  18.     }
  19.     else
  20.     {
  21.         win[1] = r(rnd) < 0.7;
  22.         win[0] = r(rnd) < 0.6;
  23.     }
  24.     return win[0] && win[1];
  25. }
  26.  
  27.  
  28. int main()
  29. {
  30.     int wins = 0, total = 1000000;
  31.     for(int i = 0; i < total; ++i)
  32.         if (ok()) wins++;
  33.     cout << double(wins)/total << endl;
  34. }
  35.  
Success #stdin #stdout 0.06s 4804KB
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0.421023
https://ideone.com/gMjOnu
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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