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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     ios_base::sync_with_stdio(false);
  6.     cin.tie(NULL);
  7.     cout.tie(NULL);
  8.  
  9.     long long n, m, x = 0;
  10.     cin >> n >> m;
  11.  
  12.     for (int i = n; i <= m; i++) {
  13.         x += i;  
  14.     }
  15.  
  16.     cout << x << endl;  
  17. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
6 10
stdout 
40
https://ideone.com/GTg9H9
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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