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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     // input
  6.     int a, b;
  7.     cin >> a >> b;
  8.  
  9.     // process
  10.     long long sum = 0;
  11.     for (int i = a; i <= b; i++) {
  12.         sum = sum + i;
  13.     }
  14.  
  15.     // output
  16.     cout << sum;
  17.     return 0;
  18. }
Success #stdin #stdout 0.01s 5292KB
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https://ideone.com/fToNQk
language:
C++ (gcc 8.3)
created:
11 hours ago
visibility:
public

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