Digit Reversal and Palindrome Number Check

Medium ⏱ 12 min 63% acceptance ★★★★★ 4.8

Write a function is_palindrome_number(n) that returns True if the non-negative integer n reads the same forwards and backwards as a number, computed by reversing its digits with a while loop using arithmetic (% 10, // 10) — no string conversion.

Examples

Example 1

Input

is_palindrome_number(121)

Output

True

Explanation

Reversing 121 gives 121.

Example 2

Input

is_palindrome_number(123)

Output

False

Explanation

Reversing 123 gives 321, which differs.

Constraints

n is a non-negative integer.
Must not convert n to a string.

Topics

Loopswhile loop

Companies

UberPayPal

Hints

Hint 1

Build the reversed number digit by digit: `reversed_n = reversed_n * 10 + n % 10`.

Hint 2

Compare the fully reversed number to a saved copy of the original.

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