Resources

• LeetCode
• NeetCode
• Grind 75
• Algorithms Cheatsheet

Patterns

• Two Pointers Patterns
• Sliding Window Patterns
• Binary Search Patterns

Data Structures & Algorithms

• Arrays
• Strings
• Binary Search
• Sliding Window
• Stack
• Two Pointers
• Dynamic Programming
• Recursion
• Greedy

Arrays

#	Problem	Difficulty
217	Contains Duplicate	Easy
242	Valid Anagram	Easy
1365	How Many Numbers Are Smaller Than the Current Number	Easy
2108	Find First Palindromic String in the Array	Easy
2194	Cells in a Range on an Excel Sheet	Easy
49	Group Anagrams	Medium
128	Longest Consecutive Sequence	Medium
122	Best Time to Buy and Sell Stocks II	Medium
36	Valid Sudoku	Medium
189	Rotate Array	Medium
347	Top K Frequent Elements	Medium

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Strings

#	Problem	Difficulty
804	Unique Morse Code Words	Easy
1859	Sorting the Sentence	Easy
557	Reverse Words in a String III	Easy
2325	Decode the Message	Easy
383	Ransom Note	Easy
205	Isomorphic Strings	Easy
290	Word Pattern	Easy
500	Keyboard Row	Easy
925	Long Pressed Name	Easy
2744	Find Maximum Number of String Pairs	Easy
1309	Decrypt String from Alphabet to Integer Mapping	Easy
1844	Replace All Digits with Characters	Easy
1160	Find Words That Can Be Formed by Characters	Easy
13	Roman to Integer	Easy
1624	Largest Substring Between Two Equal Characters	Easy
1897	Redistribute Characters to Make All Strings Equal	Easy
1422	Maximum Score After Splitting a String	Easy
151	Reverse Words in a String	Medium
890	Find and Replace Pattern	Medium
1529	Minimum Suffix Flips	Medium

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Binary Search

#	Problem	Difficulty
704	Binary Search	Easy
33	Search in Rotated Sorted Array	Medium
74	Search a 2D Matrix	Medium
153	Find Minimum in Rotated Sorted Array	Medium
162	Find Peak Element	Medium

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Sliding Window

#	Problem	Difficulty
121	Best Time to Buy and Sell Stocks	Easy
1876	Substrings of Size Three with Distinct Characters	Easy
643	Maximum Average Subarray I	Easy
2269	Find the K Beauty of a Number	Easy
209	Minimum Size Subarray Sum	Medium
1248	Count Number of Nice Subarrays	Medium

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Stack

#	Problem	Difficulty
20	Valid Parentheses	Easy
150	Evaluate Reverse Polish Notation	Medium

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Two Pointers

#	Problem	Difficulty
125	Valid Palindrome	Easy
680	Valid Palindrome II	Easy
1	Two Sum	Easy
917	Reverse Only Letters	Easy
283	Move Zeros	Easy
167	Two Sum II - Input Array is Sorted	Medium
15	3 Sum	Medium
75	Sort Colors	Medium
438	Find All Anagrams in a String	Medium

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Linked List

#	Problem	Difficulty
206	Reverse Linked List	Easy

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Dynamic Programming

#	Problem	Difficulty
53	Maximum Subarray	Medium

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Recursion

#	Problem	Difficulty
912	Sort an Array	Medium

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Greedy

#	Problem	Difficulty
134	Gas Station	Medium

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