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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.   int l = -1000000000, r = 1000000000;
  7.   long long res = 0;
  8.   for (int x=l; x<=r; x+=2) res+= x;
  9.   cout << res << endl;
  10.  
  11.   return 0;
  12. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/DhGs0F
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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