Sort Characters By Frequency (LeetCode 451)
The problem You get a string . Rearrange it so that characters appear in order…
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#string
13 posts
Short Encoding of Words (LeetCode 820)
The problem You want to encode a list of words as one string where each word is…
Replace Words (LeetCode 648)
The problem You get a list of roots (the dictionary) and a sentence of space…
Reorganize String (LeetCode 767)
The problem You get a string of lowercase letters. Rearrange its letters so…
Longest Common Prefix (LeetCode 14)
The problem You get a list of strings. Return the longest string that is a…
Implement Trie (Prefix Tree) (LeetCode 208)
The problem Design a class with three methods: stores a word. returns only…
Tries (Prefix Trees)
A hash set can tell you whether an exact word exists, but it is useless the…
Replace all spaces in a string with %20
Problem Statement Replace all spaces in a string with ‘%20’ (three characters…
Valid Palindrome - Leet Code Solution
Problem Statement Given a string, determine if it is a palindrome, considering…
Valid Anagrams - Leet Code Solution
Problem Statement Given two strings s and t , write a function to determine if t…
First Unique Character in a String - Leet Code Solution
Problem Statement Given a string, find the first non-repeating character in it…
Reverse String - Leet Code Solution
Problem Statement Write a function that reverses a string. The input string is…
Reverse digits of a signed integer - Leet Code Solution
Problem Statement Given a signed integer, reverse digits of an integer. Return…