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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. void combinationGen(int B[], int K, int N, bool &finished) {
  5.     int i = K;
  6.     while (i > 0 && B[i] == N - K + i) i--;
  7.     if (i == 0) {
  8.         finished = true;
  9.     } else {
  10.         B[i]++;
  11.         for (int j = i + 1; j <= K; j++) B[j] = B[i] + j - i;
  12.     }
  13. }
  14.  
  15. void generateCombinations(int n, int k) {
  16.     int B[20];
  17.     bool finished = false;
  18.     for (int i = 1; i <= k; i++) B[i] = i;
  19.  
  20.     while (!finished) {
  21.         for (int i = 1; i <= k; i++) {
  22.             cout << B[i] << " ";
  23.         }
  24.         cout << endl;
  25.         combinationGen(B, k, n, finished);
  26.     }
  27. }
  28.  
  29. int main() {
  30.     int n, k;
  31.     cin >> k >> n;
  32.     generateCombinations(n, k);
  33.     return 0;
  34. }
  35.  
Success #stdin #stdout 0.01s 5260KB
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https://ideone.com/Q1joui
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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