Copied from https://leetcode.com/discuss/general-discussion/419062/list-of-leetcode-question-to-cover-all-the-concepts-and-type-of-questions I found the following on the internet.
Array
Two Sum - https://leetcode.com/problems/two-sum/ Best Time to Buy and Sell Stock - https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ Contains Duplicate - https://leetcode.com/problems/contains-duplicate/ Product of Array Except Self - https://leetcode.com/problems/product-of-array-except-self/ Maximum Subarray - https://leetcode.com/problems/maximum-subarray/ Maximum Product Subarray - https://leetcode.com/problems/maximum-product-subarray/ Find Minimum in Rotated Sorted Array - https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/ Search in Rotated Sorted Array - https://leetcode.com/problems/search-in-rotated-sorted-array/ 3Sum - https://leetcode.com/problems/3sum/ Container With Most Water - https://leetcode.com/problems/container-with-most-water/ Binary
Sum of Two Integers - https://leetcode.com/problems/sum-of-two-integers/ Number of 1 Bits - https://leetcode.com/problems/number-of-1-bits/ Counting Bits - https://leetcode.com/problems/counting-bits/ Missing Number - https://leetcode.com/problems/missing-number/ Reverse Bits - https://leetcode.com/problems/reverse-bits/ Dynamic Programming
Climbing Stairs - https://leetcode.com/problems/climbing-stairs/ Coin Change - https://leetcode.com/problems/coin-change/ Longest Increasing Subsequence - https://leetcode.com/problems/longest-increasing-subsequence/ Longest Common Subsequence - Word Break Problem - https://leetcode.com/problems/word-break/ Combination Sum - https://leetcode.com/problems/combination-sum-iv/ House Robber - https://leetcode.com/problems/house-robber/ House Robber II - https://leetcode.com/problems/house-robber-ii/ Decode Ways - https://leetcode.com/problems/decode-ways/ Unique Paths - https://leetcode.com/problems/unique-paths/ Jump Game - https://leetcode.com/problems/jump-game/ Graph
Clone Graph - https://leetcode.com/problems/clone-graph/ Course Schedule - https://leetcode.com/problems/course-schedule/ Pacific Atlantic Water Flow - https://leetcode.com/problems/pacific-atlantic-water-flow/ Number of Islands - https://leetcode.com/problems/number-of-islands/ Longest Consecutive Sequence - https://leetcode.com/problems/longest-consecutive-sequence/ Alien Dictionary (Leetcode Premium) - https://leetcode.com/problems/alien-dictionary/ Graph Valid Tree (Leetcode Premium) - https://leetcode.com/problems/graph-valid-tree/ Number of Connected Components in an Undirected Graph (Leetcode Premium) - https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/ Interval
Insert Interval - https://leetcode.com/problems/insert-interval/ Merge Intervals - https://leetcode.com/problems/merge-intervals/ Non-overlapping Intervals - https://leetcode.com/problems/non-overlapping-intervals/ Meeting Rooms (Leetcode Premium) - https://leetcode.com/problems/meeting-rooms/ Meeting Rooms II (Leetcode Premium) - https://leetcode.com/problems/meeting-rooms-ii/ Linked List
Reverse a Linked List - https://leetcode.com/problems/reverse-linked-list/ Detect Cycle in a Linked List - https://leetcode.com/problems/linked-list-cycle/ Merge Two Sorted Lists - https://leetcode.com/problems/merge-two-sorted-lists/ Merge K Sorted Lists - https://leetcode.com/problems/merge-k-sorted-lists/ Remove Nth Node From End Of List - https://leetcode.com/problems/remove-nth-node-from-end-of-list/ Reorder List - https://leetcode.com/problems/reorder-list/ Matrix
Set Matrix Zeroes - https://leetcode.com/problems/set-matrix-zeroes/ Spiral Matrix - https://leetcode.com/problems/spiral-matrix/ Rotate Image - https://leetcode.com/problems/rotate-image/ Word Search - https://leetcode.com/problems/word-search/ String
Longest Substring Without Repeating Characters - https://leetcode.com/problems/longest-substring-without-repeating-characters/ Longest Repeating Character Replacement - https://leetcode.com/problems/longest-repeating-character-replacement/ Minimum Window Substring - https://leetcode.com/problems/minimum-window-substring/ Valid Anagram - https://leetcode.com/problems/valid-anagram/ Group Anagrams - https://leetcode.com/problems/group-anagrams/ Valid Parentheses - https://leetcode.com/problems/valid-parentheses/ Valid Palindrome - https://leetcode.com/problems/valid-palindrome/ Longest Palindromic Substring - https://leetcode.com/problems/longest-palindromic-substring/ Palindromic Substrings - https://leetcode.com/problems/palindromic-substrings/ Encode and Decode Strings (Leetcode Premium) - https://leetcode.com/problems/encode-and-decode-strings/ Tree
Maximum Depth of Binary Tree - https://leetcode.com/problems/maximum-depth-of-binary-tree/ Same Tree - https://leetcode.com/problems/same-tree/ Invert/Flip Binary Tree - https://leetcode.com/problems/invert-binary-tree/ Binary Tree Maximum Path Sum - https://leetcode.com/problems/binary-tree-maximum-path-sum/ Binary Tree Level Order Traversal - https://leetcode.com/problems/binary-tree-level-order-traversal/ Serialize and Deserialize Binary Tree - https://leetcode.com/problems/serialize-and-deserialize-binary-tree/ Subtree of Another Tree - https://leetcode.com/problems/subtree-of-another-tree/ Construct Binary Tree from Preorder and Inorder Traversal - https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/ Validate Binary Search Tree - https://leetcode.com/problems/validate-binary-search-tree/ Kth Smallest Element in a BST - https://leetcode.com/problems/kth-smallest-element-in-a-bst/ Lowest Common Ancestor of BST - https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/ Implement Trie (Prefix Tree) - https://leetcode.com/problems/implement-trie-prefix-tree/ Add and Search Word - https://leetcode.com/problems/add-and-search-word-data-structure-design/ Word Search II - https://leetcode.com/problems/word-search-ii/ Heap
Merge K Sorted Lists - https://leetcode.com/problems/merge-k-sorted-lists/ Top K Frequent Elements - https://leetcode.com/problems/top-k-frequent-elements/ Find Median from Data Stream - https://leetcode.com/problems/find-median-from-data-stream/ You're welcome!