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  1. #include <stdio.h>
  2. #include <math.h>
  3. int digi(int a){
  4. 	int r, p;
  5. 	r = 1;
  6. 	p = 1;
  7. 	while(a>= p) {
  8. 		p = pow(2, r) + p ;
  9. 		r = r + 1;
  10. 	}
  11. 	return r;
  12. }
  13.  
  14. int main(){
  15. 	int x;
  16. 	scanf("%d", &x);
  17. 	printf("%d\n", digi(x));
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 5308KB
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https://ideone.com/Wl6CwT
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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