Package g2301_2400.s2396_strictly_palindromic_number

Class Solution

java.lang.Object
g2301_2400.s2396_strictly_palindromic_number.Solution
public class Solution extends java.lang.Object
2396 - Strictly Palindromic Number.

Medium

An integer n is strictly palindromic if, for every base b between 2 and n - 2 ( inclusive ), the string representation of the integer n in base b is palindromic.

Given an integer n, return true if n is strictly palindromic and false otherwise.

A string is palindromic if it reads the same forward and backward.

Example 1:

Input: n = 9

Output: false

Explanation: In base 2: 9 = 1001 (base 2), which is palindromic.

In base 3: 9 = 100 (base 3), which is not palindromic.

Therefore, 9 is not strictly palindromic so we return false.

Note that in bases 4, 5, 6, and 7, n = 9 is also not palindromic.

Example 2:

Input: n = 4

Output: false

Explanation: We only consider base 2: 4 = 100 (base 2), which is not palindromic.

Therefore, we return false.

Constraints:

  • 4 <= n <= 105

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    isStrictlyPalindromic(int n)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • isStrictlyPalindromic

      public boolean isStrictlyPalindromic(int n)