Numbers with same first and last digit
Easy Accuracy: 35.35% Submissions: 811 Points: 2

Given a range of numbers starting with integer L and ending at R, the task is to count the numbers which have same first and last digits.

 

Example 1:

Input:
L = 7 
R = 68
Output:
9
Explanation:
Number with the same 
first and last digits 
in the given range is:
[7, 8, 9, 11, 22, 33, 
44 ,55, 66].

 

Example 2:

Input:
L = 5
R = 40
Output:
8
Explanation:
Number with the same
first and last digits
in the given range is:
[5, 6, 7, 8, 9, 11, 
22, 33, 44].


 

Your Task:

You don't need to read input or print anything. Your task is to complete the function numbersInRange() which takes integers L and R and returns the count of numbers if L>R return 0.

 

Expected Time Complexity: O(1)
Expected Auxiliary Space: O(1)

 

Constraints:
1 <= L,R <= 108

 

We are replacing the old Disqus forum with the new Discussions section given below.
Click here to view old Disqus comments.


to report an issue on this page.

Editorial

We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?

Yes

All Submissions

My Submissions:

Login to access your submissions.

Numbers with same first and last digit

Output Window