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  1. #include <stdio.h>
  2. int check_three(int n);
  3. int count_range(int n);
  4. int main()
  5. {
  6. 	int n;
  7. 	scanf("%d", &n);
  8. 	count_range(n);
  9. 	return 0;
  10.  
  11. }
  12. int check_three(int n)
  13. {
  14. 	int count=0;
  15.  
  16. 		while(n>0)
  17. 		{
  18. 			if(n%10==3)
  19. 			{
  20. 				count++;
  21. 			}
  22. 			n=n/10;
  23. 		}
  24.  
  25. 	return count;
  26. }
  27.  
  28. int count_range(int n)
  29. {
  30. 	int count=0;
  31. 	for(int i=1; i<=n; i++)
  32. 	{
  33. 		count+=check_three(i);
  34. 	}
  35. 	printf("%d", count);
  36. }
  37.  
  38.  
  39.  
  40.  
Success #stdin #stdout 0s 4160KB
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https://ideone.com/T03sT1
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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