Surviving a Double Flip

Easy

To reverse a number, write its digits in the opposite order. Any leading zeros are dropped: 5200 becomes 25, and 13 becomes 31. You are given a non-negative integer n. Reverse it, then reverse the result once more. Return true if you end up with n again, and false otherwise.

Example 1

n=4071 → True

4071 → 1704 → 4071: the number comes back to itself.

Example 2

n=350 → False

350 → 53 (the leading zero is dropped) → 35, which is not 350.

Example 3

n=0 → True

Zero stays zero when reversed.

Constraints

0 ≤ n ≤ 10¹²

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Topics

Math

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Input

n=4071

Expected

True

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