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  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n = 3;
  7. 	int i = 10;
  8. 	int res = 0; 
  9. 	while(i < n){
  10. 		res += (i - i/10)*log10(i);
  11. 		i *= 10;
  12. 	}
  13. 	res += (n - i/10)*log10(i)+ceil(log10(n));
  14. 	cout<<res;
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 3296KB
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https://ideone.com/XeJDpB
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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