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  1. #include <string>
  2. #include <iostream>
  3. #include <algorithm>
  4. #include <iomanip>
  5.  
  6. using namespace std;
  7.  
  8. int main()
  9. {
  10.   string winners[8] = {"France", "Germany", "Spain", "Germany", "Italy", "Germany", "Spain", "England"};
  11.   string runnersup[8] = {"Portugal", "England", "Italy", "Spain1", "Ukraine", "Spain2", "Scotland", "Turkey"};
  12.   sort(runnersup, runnersup+8);
  13.   int count = 0;
  14.   do {
  15.     bool badseeding = false;
  16.     for (int i = 0; i < 8; ++i)
  17.     {
  18.        if (winners[i].substr(0,3) == runnersup[i].substr(0,3))
  19.        {
  20.          badseeding = true;
  21.          break;
  22.        }
  23.     }
  24.     if (!badseeding) ++count;
  25.   } while (next_permutation(runnersup, runnersup+8));  
  26.   cout << "different seedings: " << count << endl;
  27.   cout << fixed << setprecision(5) << "probability: " << 1.0 / count << endl;
  28. }
Success #stdin #stdout 0.08s 2864KB
comments (?)
stdin 
Standard input is empty
stdout 
different seedings: 17088
probability: 0.00006
https://ideone.com/qTLp9m
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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