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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4. #include <bits/stdc++.h>
  5. #include <algorithm>
  6. using namespace std;
  7. int main(){
  8. 	int n;cin>>n;
  9. 	double sum=0,S=2*n+1,Z=2*n+2;
  10. 	while(S>=1&&Z>=2){
  11. 		sum+=S/Z;
  12. 		S--;Z--;
  13. 	}
  14. 	cout<<sum;
  15. 	return 0;
  16. }
Success #stdin #stdout 0.01s 5264KB
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Standard input is empty
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65522.3
https://ideone.com/19rYdt
4
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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