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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int n, i = 2, s = 0;
  6.     cin >> n;
  7.     while (i <= n) {
  8.         s += i;
  9.         i += 2;
  10.     }
  11.     cout << "" << s;
  12. }
Success #stdin #stdout 0.01s 5308KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/J5ZMOe
language:
C++14 (clang 8.0)
created:
1 day ago
visibility:
public

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