- 1 Two Sum #Array #HashTable #Greedy
- 2 Container With Most Water #Array #TwoPointers #Greedy
- 3 Trapping Rain Water #Array #TwoPointers #DynamicProgramming #Stack #MonotonicStack
- 4 Backspace String Compare #TwoPointers #String #Stack #Simulation
- 5 Longest Substring Without Repeating Characters #HashTable #String #SlidingWindow
- 6 Valid Palindrome #TwoPointers #String
- 7 Valid Palindrome II #TwoPointers #String #Greedy
- 8 Reverse Linked List #LinkedList #Recursion
- 9 Reverse Linked List II #LinkedList
- 10 Flatten a Multilevel Doubly Linked List #LinkedList #DFS #Doubly-LinkedList
- 11 Linked List Cycle II #HashTable #LinkedList #TwoPointers
- 12 Valid Parentheses #String #Stack
- 13 Minimum Remove to Make Valid Parentheses #String #Stack
- 14 Implement Queue using Stacks #Stack #Queue #Desigh
- 15 Kth Largest Element in an Array #Array #DivideAndConquer #Sorting #HeapPriorQueue #QuickSelect
- 16 Find First and Last Position of Element in Sorted Array #Array #BinarySearch
- 17 Maximum Depth of Binary Tree #Tree #DFS #BFS #BinaryTree
- 18 Binary Tree Level Order Traversal #BFS #Tree #BinaryTree
- 19 Binary Tree Right Side View #Tree #DFS #BFS #BinaryTree
- 20 Count Complete Tree Nodes #BinarySearch #Tree #DFS #BinaryTree
- 21 Validate Binary Search Tree #Tree #DFS #BinarySearchTree #BinaryTree
- 22 Number of Islands #Array #DFS #BFS #UnionFind #Matrix
- 23 Rotting Oranges #Array #BFS #Matrix
- 24 Walls and Gates #Array #DFS #Matrix
- 25 Time Needed to Inform All Employees #Tree #DFS #BFS
- 26 Course Schedule #DFS #BFS #Graph #TopologicalSort
- 27 Network Delay Time #DFS #BFS #Graph #HeapPriorQueue #ShortestPath
- 28 Min Cost Climbing Stairs #Array #DynamicProgramming
https://hackernoon.com/14-patterns-to-ace-any-coding-interview-question-c5bb3357f6ed https://medium.com/interviewnoodle/grokking-leetcode-a-smarter-way-to-prepare-for-coding-interviews-e86d5c9fe4e1
- https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/
- https://leetcode.com/problems/remove-duplicates-from-sorted-array/
- https://leetcode.com/problems/squares-of-a-sorted-array/
- https://leetcode.com/problems/3sum/ (Blind)
- https://leetcode.com/problems/3sum-closest/
- https://leetcode.com/problems/3sum-smaller/
- https://leetcode.com/problems/subarray-product-less-than-k/
- https://leetcode.com/problems/sort-colors/
- https://leetcode.com/problems/4sum/
- https://leetcode.com/problems/backspace-string-compare/
- https://leetcode.com/problems/shortest-unsorted-continuous-subarray/
- https://leetcode.com/problems/maximum-subarray/ (Blind)
- https://leetcode.com/problems/minimum-size-subarray-sum/
- https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters/
- https://leetcode.com/problems/fruit-into-baskets/
- https://leetcode.com/problems/longest-substring-without-repeating-characters/ (Blind)
- https://leetcode.com/problems/longest-repeating-character-replacement/ (Blind)
- https://leetcode.com/problems/max-consecutive-ones-iii/
- https://leetcode.com/problems/permutation-in-string/
- https://leetcode.com/problems/find-all-anagrams-in-a-string/
- https://leetcode.com/problems/minimum-window-substring/ (Blind)
- https://leetcode.com/problems/substring-with-concatenation-of-all-words/
- https://leetcode.com/problems/linked-list-cycle/ (Blind)
- https://leetcode.com/problems/linked-list-cycle-ii/
- https://leetcode.com/problems/happy-number/
- https://leetcode.com/problems/middle-of-the-linked-list/
- https://leetcode.com/problems/palindrome-linked-list/
- https://leetcode.com/problems/reorder-list/ (Blind)
- https://leetcode.com/problems/circular-array-loop/
- https://leetcode.com/problems/merge-intervals/ (Blind)
- https://leetcode.com/problems/insert-interval/ (Blind)
- https://leetcode.com/problems/interval-list-intersections/
- https://leetcode.com/problems/meeting-rooms/ (Blind and Premium)
- https://leetcode.com/problems/meeting-rooms-ii/ (Blind and Premium)
- https://leetcode.com/problems/maximum-profit-in-job-scheduling/
- https://leetcode.com/problems/employee-free-time/
- https://leetcode.com/problems/missing-number/ (Blind)
- https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/
- https://leetcode.com/problems/find-the-duplicate-number/
- https://leetcode.com/problems/find-all-duplicates-in-an-array/
- https://leetcode.com/problems/set-mismatch/
- https://leetcode.com/problems/first-missing-positive/
- https://leetcode.com/problems/kth-missing-positive-number/
- https://leetcode.com/problems/reverse-linked-list/ (Blind)
- https://leetcode.com/problems/reverse-linked-list-ii/
- https://leetcode.com/problems/reverse-nodes-in-k-group/
- Alternation to previous question
- https://leetcode.com/problems/rotate-list/
- https://leetcode.com/problems/binary-tree-level-order-traversal/ (Blind)
- https://leetcode.com/problems/binary-tree-level-order-traversal-ii/
- https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/
- https://leetcode.com/problems/average-of-levels-in-binary-tree/
- https://leetcode.com/problems/minimum-depth-of-binary-tree/
- https://leetcode.com/problems/maximum-depth-of-binary-tree/ (Not grokk but Blind)
- https://leetcode.com/problems/inorder-successor-in-bst/ (In order instead of level order)
- https://leetcode.com/problems/populating-next-right-pointers-in-each-node/
- Alternation to previous question
- https://leetcode.com/problems/binary-tree-right-side-view/
- https://leetcode.com/problems/path-sum/
- https://leetcode.com/problems/path-sum-ii/
- https://leetcode.com/problems/sum-root-to-leaf-numbers/
- https://leetcode.com/problems/check-if-a-string-is-a-valid-sequence-from-root-to-leaves-path-in-a-binary-tree/description/
- https://leetcode.com/problems/path-sum-iii/
- https://leetcode.com/problems/diameter-of-binary-tree/
- https://leetcode.com/problems/binary-tree-maximum-path-sum/ (Blind)
- https://leetcode.com/problems/find-median-from-data-stream/ (Blind)
- https://leetcode.com/problems/sliding-window-median/
- https://leetcode.com/problems/ipo/
- https://leetcode.com/problems/find-right-interval/
- https://leetcode.com/problems/subsets/
- https://leetcode.com/problems/subsets-ii/
- https://leetcode.com/problems/permutations/
- https://leetcode.com/problems/letter-case-permutation/
- https://leetcode.com/problems/generate-parentheses/
- https://leetcode.com/problems/generalized-abbreviation/
- https://leetcode.com/problems/different-ways-to-add-parentheses/
- https://leetcode.com/problems/unique-binary-search-trees-ii/
- https://leetcode.com/problems/unique-binary-search-trees/
- https://leetcode.com/problems/binary-search/ (Blind)
- Couldn't find Ceiling of a Number
- https://leetcode.com/problems/find-smallest-letter-greater-than-target/
- https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/
- https://leetcode.com/problems/search-in-a-sorted-array-of-unknown-size/
- https://leetcode.com/problems/minimum-absolute-difference/ (Close)
- Couldn't find Bitonic Array Maximum
- Couldn't find Search Bitonic Array
- https://leetcode.com/problems/search-in-rotated-sorted-array/ (Blind)
- https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/ (Blind)
- https://leetcode.com/problems/single-number/
- https://leetcode.com/problems/single-number-iii/
- https://leetcode.com/problems/complement-of-base-10-integer/
- https://leetcode.com/problems/flipping-an-image/
- Couldn't find Top 'K' elements
- Couldn't find Kth Smallest Number
- https://leetcode.com/problems/k-closest-points-to-origin/
- https://leetcode.com/problems/minimum-cost-to-connect-sticks/
- https://leetcode.com/problems/top-k-frequent-elements/ (Blind)
- https://leetcode.com/problems/sort-characters-by-frequency/
- https://leetcode.com/problems/kth-largest-element-in-a-stream/
- https://leetcode.com/problems/find-k-closest-elements/
- https://leetcode.com/problems/least-number-of-unique-integers-after-k-removals/
- Couldn't find Sum of Elements
- https://leetcode.com/problems/reorganize-string/
- https://leetcode.com/problems/rearrange-string-k-distance-apart/
- https://leetcode.com/problems/task-scheduler/
- https://leetcode.com/problems/maximum-frequency-stack/
- https://leetcode.com/problems/merge-k-sorted-lists/ (Blind)
- https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix/
- https://leetcode.com/problems/smallest-range-covering-elements-from-k-lists/
- https://leetcode.com/problems/find-k-pairs-with-smallest-sums/
- https://www.educative.io/courses/grokking-dynamic-programming-patterns-for-coding-interviews/RM1BDv71V60 (Free)
- https://leetcode.com/problems/partition-equal-subset-sum/ or https://www.educative.io/courses/grokking-dynamic-programming-patterns-for-coding-interviews/3jEPRo5PDvx (Free)
- https://leetcode.com/problems/subarray-sum-equals-k/ (Similar) or https://www.educative.io/courses/grokking-dynamic-programming-patterns-for-coding-interviews/3j64vRY6JnR (Free)
- https://leetcode.com/problems/partition-array-into-two-arrays-to-minimize-sum-difference/
- https://leetcode.com/problems/combination-sum-ii/ or https://leetcode.com/problems/combination-sum-iv/ (Blind)
- https://leetcode.com/problems/target-sum/
- Couldn't find Topological Sort
- https://leetcode.com/problems/course-schedule/ (Blind)
- https://leetcode.com/problems/course-schedule-ii/
- Alternation to previous question
- https://leetcode.com/problems/alien-dictionary/ (Blind and Premium)
- https://leetcode.com/problems/sequence-reconstruction/description/
- https://leetcode.com/problems/minimum-height-trees/