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  1. #include <iostream>
  2. using namespace std;
  3. #include<algorithm>
  4. #include<string>
  5. int arr[10];
  6. int r,n;
  7. void dfs(int x,int number)
  8. {
  9. 	if(x>r)
  10. 	{
  11. 		for(int i=1;i<=r;i++)
  12. 		{
  13. 			printf("%3d",arr[i]);
  14. 		}
  15. 		cout<<endl;
  16. 		return ;
  17. 	}
  18. 	for(int i=number;i<=n;i++)
  19. 	{
  20. 		arr[x]=i;
  21. 		dfs(x+1,i+1);
  22. 		arr[x]=0;
  23. 	}
  24.  
  25.  
  26.  
  27.  
  28.  
  29. }
  30. int main() {
  31. 	// your code goes here
  32. 	cin>>n>>r;
  33. 	dfs(1,1);
  34. 	return 0;
  35. }
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin
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5
3
stdout
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  1  2  3
  1  2  4
  1  2  5
  1  3  4
  1  3  5
  1  4  5
  2  3  4
  2  3  5
  2  4  5
  3  4  5
https://ideone.com/u7rsPo
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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