Package g2101_2200.s2119_a_number_after_a_double_reversal

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    2119 - A Number After a Double Reversal.

    Easy

    Reversing an integer means to reverse all its digits.

    • For example, reversing 2021 gives 1202. Reversing 12300 gives 321 as the leading zeros are not retained.

    Given an integer num, reverse num to get reversed1, then reverse reversed1 to get reversed2. Return true if reversed2 equals num. Otherwise return false.

    Example 1:

    Input: num = 526

    Output: true

    Explanation: Reverse num to get 625, then reverse 625 to get 526, which equals num.

    Example 2:

    Input: num = 1800

    Output: false

    Explanation: Reverse num to get 81, then reverse 81 to get 18, which does not equal num.

    Example 3:

    Input: num = 0

    Output: true

    Explanation: Reverse num to get 0, then reverse 0 to get 0, which equals num.

    Constraints:

    • <code>0 <= num <= 10<sup>6</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Boolean isSameAfterReversals(Integer num)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait