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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int sum_recursion(int n){
  5. 	if(n == 0){
  6. 		return 0;
  7. 	}
  8.  
  9. 	return n + sum_recursion(n-1);
  10. }
  11.  
  12. int main() {
  13. 	// your code goes here
  14. 	int n; cin >> n;
  15. 	cout << sum_recursion(n);
  16. 	return 0;
  17. }
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/vjBnkS
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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