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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int n, k, a[10], d = 1;
  5.  
  6. void pr() {
  7.     cout << d << ": ";
  8.     for (int i = 0; i < k; i++)
  9.         cout << a[i] << " ";
  10.     cout << endl;
  11.     d++;
  12. }
  13.  
  14. void choose(int i, int start) {
  15.     for (int j = start; j <= n; j++) {
  16.         a[i] = j;
  17.         if (i == k - 1)
  18.             pr();
  19.         else
  20.             choose(i + 1, j + 1);
  21.     }
  22. }
  23.  
  24. int main() {
  25.     cin >> n >> k;
  26.     choose(0, 1);
  27. }
  28.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin
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5 3
stdout
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1: 1 2 3 
2: 1 2 4 
3: 1 2 5 
4: 1 3 4 
5: 1 3 5 
6: 1 4 5 
7: 2 3 4 
8: 2 3 5 
9: 2 4 5 
10: 3 4 5
https://ideone.com/V3iSG2
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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