Repository: Verse1/LeetGrokk
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└── README.md

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FILE: README.md
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# LeetGrokk

## Checkbox Instructions

To use the checkboxes you must fork the repository and add an X instead of a space between the brackets
- [X] Checked
- [ ] Unchecked

## Premium questions

You can access premium question on lintcode.com

## Patterns
https://hackernoon.com/14-patterns-to-ace-any-coding-interview-question-c5bb3357f6ed

## Pattern: Sliding Window

- [ ] 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/

## Pattern: Islands(Matrix Traversal)
- [ ] https://leetcode.com/problems/number-of-islands/ (Blind)
- [ ] https://leetcode.com/problems/max-area-of-island/
- [ ] https://leetcode.com/problems/flood-fill/
- [ ] https://leetcode.com/problems/number-of-closed-islands/
- [ ] https://leetcode.com/problems/island-perimeter/
- [ ] https://leetcode.com/problems/number-of-distinct-islands/
- [ ] https://leetcode.com/problems/detect-cycles-in-2d-grid/
## Pattern: Two Pointers
- [ ] 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/

## Pattern: Fast & Slow pointers
- [ ] 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/

## Pattern: Merge Intervals
- [ ] 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/

## Pattern: Cyclic Sort

- Couldn't find Cyclic Sort
- [ ] 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/

## Pattern: In-place Reversal of a LinkedList
- [ ] 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/

## Pattern: Tree Breadth First Search
- [ ] 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/

## Pattern: Tree Depth First Search
- [ ] 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)

## Pattern: Two Heaps
- [ ] 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/

## Pattern: Subsets
- [ ] 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/

## Pattern: Modified Binary Search
- [ ] 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)

## Pattern: Bitwise XOR
- [ ] 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/

## Pattern: Top 'K' elements
- 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/

## Pattern: K-way merge
- [ ] https://leetcode.com/problems/merge-k-sorted-lists/ (Blind)
- Alternation to previous question
- [ ] 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/ 

## Pattern: 0/1 Knapsack (Dynamic Programming)
- [ ] 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/

## Pattern: Topological Sort (Graph)
- 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/

## Pattern: Multi-threaded
- [ ] https://leetcode.com/problems/same-tree/ (Blind)
- [ ] https://leetcode.com/problems/invert-binary-tree/ (Blind)
- [ ] https://leetcode.com/problems/binary-search-tree-iterator/


## Miscellaneous

- [ ] https://leetcode.com/problems/kth-largest-element-in-an-array/