Two pointers [mp]

Micro pattern¶

Problems¶

Backward¶

• 88. Merge Sorted Array (Top Easy)

Read/write pointer¶

• 26. Remove Duplicates from Sorted Array (Top Easy)
• 283. Move Zeroes (Top Easy)

Sliding window¶

• 3. Longest Substring Without Repeating Characters (Top Medium)
• 5. Longest Palindromic Substring (Top Medium)

Slow/fast¶

• 19. Remove Nth Node From End of List (Top Easy)
• 141. Linked List Cycle (Top Easy)
• 234. Palindrome Linked List (Top Easy)

Miscelaneous¶

• 101. Symmetric Tree (Top Easy)
• 125. Valid Palindrome (Top Easy)
• 344. Reverse String (Top Easy)
• 904. Fruit Into Baskets (Google Prep)
• 15. 3Sum (Top Medium)
• 38. Count and Say (Top Medium)
• 160. Intersection of Two Linked Lists (Top Medium)
• 328. Odd Even Linked List (Top Medium)

One pointer¶

• 116. Populating Next Right Pointers in Each Node (Top Medium)
• 240. Search a 2D Matrix II (Top Medium)

Three pointers¶

• 206. Reverse Linked List (Top Easy)
• 75. Sort Colors (Top Medium)