- July 1, 2020: Arranging Coins
- July 2, 2020: Binary Tree Level Order Traversal II
- July 3, 2020: Prison cells After N Days
- July 4, 2020: Ugly Number II
- July 5, 2020: Hamming Distance
- July 6, 2020: Plus One
- July 7, 2020: Island Perimeter
- July 8, 2020: 3Sum
- July 9, 2020: Maximum Width of Binary Tree
- July 10, 2020: Flatten Binary Tree to Linked List
- July 11, 2020: Subsets
- July 12, 2020: Reverse Bits
- July 13, 2020: Same Tree
- July 14, 2020: Angle Between Hands of a Clock
- July 15, 2020: Reverse Words in a String
- July 16, 2020: Pow(x, n)
- July 17, 2020: Top K Frequent Elements
- July 18, 2020: Course Schedule II
- July 19, 2020: Add Binary
- July 20, 2020: Remove Linked List Elements
- July 21, 2020: Word Search
- July 22, 2020: Binary Tree Zigzag Level Order Traversal
- July 23, 2020: Single Number III
- July 24, 2020: All Paths From Source to Target
- July 25, 2020: Find Minimum in Rotated Sorted Array II
- July 26, 2020: Add Digits
- July 27, 2020: Construct Binary Tree from Inorder and Postorder Traversal
- July 28, 2020: Task Scheduler
- July 29, 2020: Best Time to Buy and Sell Stock with Cooldown
- July 30, 2020: Word Break II
- July 31, 2020: Climbing Stairs