LeetCode_75

Must-do Problem List

Array / String

• 1768. Merge Strings Alternately Easy ✅

• 1071. Greatest Common Divisor of Strings Easy ✅

• 1431. Kids With the Greatest Number of Candies Easy ✅

• 605. Can Place Flowers Easy ✅

• 345. Reverse Vowels of a String Easy ✅

• 151. Reverse Words in a String Medium ✅

• Product of Array Except Self Medium

• Increasing Triplet Subsequence Medium

• String Compression Medium

Two Pointers

• Move Zeroes Easy

• Is Subsequence Easy

• Container With Most Water Medium

• Max Number of K-Sum Pairs Medium

Sliding Window

• Maximum Average Subarray I Easy

• Maximum Number of Vowels in a Substring of Given Length Medium

• Max Consecutive Ones III Medium

• Longest Subarray of 1's After Deleting One Element Medium

Prefix Sum

• Find the Highest Altitude Easy

• Find Pivot Index Easy

Hash Map / Set

• Find the Difference of Two Arrays Easy

• Unique Number of Occurrences Easy

• Determine if Two Strings Are Close Medium

• Equal Row and Column Pairs Medium

Stack

• Removing Stars From a String Medium

• Asteroid Collision Medium

• Decode String Medium

• Queue Number of Recent Calls Easy

• Dota2 Senate Medium

Linked List

• Delete the Middle Node of a Linked List Medium

• Odd Even Linked List Medium

• Reverse Linked List Easy

• Maximum Twin Sum of a Linked List Medium

Binary Tree - DFS

• 104. Maximum Depth of Binary Tree Easy ✅

• Leaf-Similar Trees Easy

• Count Good Nodes in Binary Tree Medium

• Path Sum III Medium

• Longest ZigZag Path in a Binary Tree Medium

• Lowest Common Ancestor of a Binary Tree Medium

Binary Tree - BFS

• Binary Tree Right Side View Medium

• Maximum Level Sum of a Binary Tree Medium

Binary Search Tree

• Search in a Binary Search Tree Easy

• Delete Node in a BST Medium

Graphs - DFS

• Keys and Rooms Medium

• Number of Provinces Medium

• Reorder Routes to Make All Paths Lead to the City Zero Medium

• Evaluate Division Medium

Graphs - BFS

• Nearest Exit from Entrance in Maze Medium

• Rotting Oranges Medium

Heap / Priority Queue

• Kth Largest Element in an Array Medium

• Smallest Number in Infinite Set Medium

• Maximum Subsequence Score Medium

• Total Cost to Hire K Workers Medium

Binary Search

• 374. Guess Number Higher or Lower Easy ✅

• Successful Pairs of Spells and Potions Medium

• Find Peak Element Medium

• 875. Koko Eating Bananas Medium ✅

Backtracking

• Letter Combinations of a Phone Number Medium

• Combination Sum III Medium

DP - 1D

• N-th Tribonacci Number Easy

• Min Cost Climbing Stairs Easy

• House Robber Medium

• Domino and Tromino Tiling Medium

DP - Multidimensional

• Unique Paths Medium

• Longest Common Subsequence Medium

• Best Time to Buy and Sell Stock with Transaction Fee Medium

• Edit Distance Medium

Bit Manipulation

• Counting Bits Easy

• Single Number Easy

• Minimum Flips to Make a OR b Equal to c Medium

Trie

• Implement Trie (Prefix Tree) Medium

• Search Suggestions System Medium

Intervals

Non-overlapping Intervals Medium

• Minimum Number of Arrows to Burst Balloons Medium

Monotonic Stack

• Daily Temperatures Medium

• Online Stock Span Medium