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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. int main(){
  5.     int n, answer;
  6.     answer = 1;
  7.     std::cin >> n;
  8.  
  9.     for(int i = 0; i < n+1; i++){
  10.         answer-=pow(-1, n+1)/n;
  11.     }
  12.  
  13.     std::cout << answer << "\n";
  14. }
Success #stdin #stdout 0.01s 5276KB
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https://ideone.com/BFxvqp
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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