Algorithm|String|Replace white space
Replace white space
Leetcode
Algorithm|String|Reverse String II
LeetCode 541. Reverse String II
Algorithm|String|Reverse String with two pointers
LeetCode 344. Reverse String
Algorithm|String|Reverse Words in a String
LeetCode 151. Reverse Words in a String
Algorithm|Hash table|Happy Number
LeetCode 202. Happy Number
Algorithm|Hash table|Intersection of Two Arrays
LeetCode 349. Intersection of Two Arrays
Algorithm|Hash table|Valid Anagram
LeetCode 242. Valid Anagram