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Shortest Palindrome

Medium

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Given a string, find and return the shortest palindrome by adding characters in front.

Sample Input:

"aacecaaa"

Sample Output:

"aaacecaaa"

Hints

Hint 1

Find longest palindrome prefix

Hint 2

Use KMP algorithm on s + "#" + reverse(s)

Hint 3

Add reverse of suffix to front

Code Editor

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