Grokking the Coding Interview: Patterns for Coding Questions
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Valid Palindrome II (easy)

Problem Statement

Given string s, determine whether it's possible to make a given string palindrome by removing at most one character.

A palindrome is a word or phrase that reads the same backward as forward.

Examples

  1. Example 1:

    • Input: "racecar"
    • Expected Output: true
    • Justification: The string is already a palindrome, so no removals are needed.

  2. Example 2:

    • Input: "abccdba"
    • Expected Output: true
    • Justification: Removing the character 'd' forms the palindrome "abccba".

  3. Example 3:

    • Input: "abcdef"
    • Expected Output:

.....

.....

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A

Anonymous

· 2 years ago

class Solution:
    def isPalindromePossible(self, s: str) -> bool:
        i = 0
        j = len(s) - 1
        count = 0
        while i < j:
            if count > 1:
                return False
            if s[i] == s[j]:
                i += 1
                j -= 1
            else:
                if s[i + 1] == s[j]:
                    i += 1
                elif s[j - 1] == s[i]:
                    j -= 1
                else:
                    return False
                count += 1
        return True
Show 1 reply
A

Anonymous

· 3 years ago

Solution is giving TLE. Why?

Show 1 reply

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