Pattern 9: Hashing

#hashing #hashmap #java

List of problems I have solved so far
- Easy
- Medium
- Hard

List of problems I have solved so far

Easy

Question	Solution	Date	Comment
136. Single Number	Solution
242. Valid Anagram	Solution
706. Design HashMap	Solution
771. Jewels and Stones	Solution

Medium

Question	Solution	Date	Comment
3. Longest Substring Without Repeating Characters	Solution
49. Group Anagrams	Solution
347. Top K Frequent Elements	Solution
981. Time Based Key-Value Store	Solution

Hard

Question	Solution	Date	Comment
30. Substring with Concatenation of All Words	Solution
128. Longest Consecutive Sequence	Solution
	Solution
	Solution

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