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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long long a,b;
  6. 	long long sum = 0;
  7. 	cin >> a >> b;
  8. 	for(long long i = a;i <= b;i++){
  9. 		sum += i;
  10. 	}
  11. 	cout << sum << endl;
  12. 	return 0;
  13. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin 
12 20
stdout 
144
https://ideone.com/oQ6sDQ
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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