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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int count_digits(int num) {
  5. 	int ans = 0;
  6. 	while(num > 0) {
  7. 		ans += num%10;
  8. 		num /= 10;
  9. 	}
  10. 	return ans;
  11. }
  12.  
  13. int main() {
  14. 	int ans = 0;
  15. 	for(int i = 1000; i < 10000; i++)
  16. 		if(count_digits(i) == 8)
  17. 			ans++;
  18. 	cout << ans << endl;
  19. 	return 0;
  20. }
Success #stdin #stdout 0.01s 5304KB
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stdin 
Standard input is empty
stdout 
120
https://ideone.com/72iEK9
language:
C++ (gcc 8.3)
created:
14 days ago
visibility:
public

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