Project Engineer

Given a positive integer ‘N’, you need to find the number of integers between 1 and N(both inclusive), that have at least one digit repeated.

For Example:

If N = 12, then only ‘11’ has repeated digits. Therefore the number of integers between 1 and 12 that have at least one digit repeated = 1.

You are given an integer 'N'. Your task is to return the sum of all N-digit numbers which are palindrome. A number is said to be palindrome if the number formed by reversing its digits is the same as the given number before.

For Example :

If the value of 'N' is 1, then the answer for this is 45.

Because the list of one-digit numbers is [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 ] and each and every number is a palindrome in itself. So our ans equals (1+ 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 0) = 45.

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