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  1. #include <stdio.h>
  2. #include<math.h>
  3.  
  4.  
  5. int check(int n)
  6. {
  7. 	int count=1;
  8. 	while(1)
  9. 	{
  10. 	    if(n==1)
  11. 	    {
  12. 	        break;
  13. 	    }
  14. 	    else if(n!=1 && n%2!=0)
  15. 	    {
  16. 	        n = (3*n)+1;
  17. 	    }
  18. 	    else
  19. 	    {
  20. 	        n/=2;
  21.  
  22. 	    }
  23. 	    count++;
  24. 	}
  25. 	return count;
  26. }
  27.  
  28.  
  29.  
  30. int main() {
  31. 	int i,j;
  32. 	scanf("%d %d",&i,&j);
  33. 	int max=0;
  34. 	if(i<=j)
  35. 	{
  36. 	    for(int start = i;start<=j;start++)
  37. 	    {
  38. 	        int ans = check(start);
  39. 	        if(ans>=max)
  40. 	        {
  41. 	            max = ans;
  42. 	        }
  43. 	    }
  44. 	    printf("%d %d %d\n",i,j,max);
  45. 	}
  46. 	else
  47. 	{
  48. 	    for(int start=i;start>=j;start--)
  49. 	    {
  50. 	        int ans = check(start);
  51. 	        if(ans>=max)
  52. 	        {
  53. 	            max = ans;
  54. 	        }
  55. 	    }
  56. 	    printf("%d %d %d\n",i,j,max);
  57. 	}
  58.  
  59.  
  60.  
  61.  
  62. }
  63.  
  64.  
Success #stdin #stdout 0s 5308KB
comments (?)
stdin 
1 21
stdout 
1 21 21
https://ideone.com/Hkr0HD
language:
C (gcc 8.3)
created:
15 days ago
visibility:
public

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