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LC_8-12_mounts_ago.txt
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LC_8-12_mounts_ago.txt
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TOP
https://leetcode.com/problems/lru-cache/
TOP of TOP 22k
https://leetcode.com/problems/longest-substring-without-repeating-characters/ 38k
https://leetcode.com/problems/find-the-duplicate-number/
https://leetcode.com/problems/product-of-array-except-self/
https://leetcode.com/problems/powx-n/
TOP stack
https://leetcode.com/problems/decode-string/
TOP idea here
https://leetcode.com/problems/sort-colors/
UNION FIND
https://leetcode.com/problems/longest-consecutive-sequence/
VERY COOOL
https://leetcode.com/problems/rotate-array/
matrix TOP
https://leetcode.com/problems/spiral-matrix/
https://leetcode.com/problems/rotate-image/
top hashtable
https://leetcode.com/problems/group-anagrams/
top dp divide and conquer
https://leetcode.com/problems/maximum-subarray/
https://leetcode.com/problems/maximum-product-subarray/
https://leetcode.com/problems/maximum-subarray/
https://leetcode.com/problems/maximum-subarray/
https://leetcode.com/problems/maximum-subarray/
excel top easy
https://leetcode.com/problems/excel-sheet-column-title/
https://leetcode.com/problems/excel-sheet-column-number/
top
2p
https://leetcode.com/problems/3sum/
NB string
https://leetcode.com/problems/string-compression/
eazy
https://leetcode.com/problems/merge-strings-alternately/
https://leetcode.com/problems/find-winner-on-a-tic-tac-toe-game/
https://leetcode.com/problems/check-array-formation-through-concatenation/
https://leetcode.com/problems/design-an-ordered-stream/
https://leetcode.com/problems/search-insert-position/
https://leetcode.com/problems/degree-of-an-array/
https://leetcode.com/problems/number-of-unequal-triplets-in-array/
https://leetcode.com/problems/circular-sentence/
https://leetcode.com/problems/check-if-matrix-is-x-matrix/
https://leetcode.com/problems/calculate-money-in-leetcode-bank/
https://leetcode.com/problems/detect-pattern-of-length-m-repeated-k-or-more-times/
https://leetcode.com/problems/count-the-number-of-vowel-strings-in-range/
https://leetcode.com/problems/count-square-sum-triples/
https://leetcode.com/problems/longest-harmonious-subsequence/
easy graph
https://leetcode.com/problems/island-perimeter/
https://leetcode.com/problems/max-area-of-island/
https://leetcode.com/problems/flood-fill/
https://leetcode.com/problems/find-if-path-exists-in-graph/
easy dp
https://leetcode.com/problems/min-cost-climbing-stairs/
medium easy
https://leetcode.com/problems/odd-string-difference/ medium easy
https://leetcode.com/problems/first-bad-version/ medium easy
https://leetcode.com/problems/distance-between-bus-stops/ medium easy
https://leetcode.com/problems/categorize-box-according-to-criteria/ medium easy
https://leetcode.com/problems/split-with-minimum-sum/
https://leetcode.com/problems/determine-if-two-events-have-conflict/
https://leetcode.com/problems/prime-arrangements/
https://leetcode.com/problems/special-array-with-x-elements-greater-than-or-equal-x/
https://leetcode.com/problems/relative-ranks/
https://leetcode.com/problems/summary-ranges/
https://leetcode.com/problems/assign-cookies/
https://leetcode.com/problems/guess-number-higher-or-lower/
https://leetcode.com/problems/best-poker-hand/ TOP of TOP
https://leetcode.com/problems/ugly-number/
https://leetcode.com/problems/minimum-value-to-get-positive-step-by-step-sum/
https://leetcode.com/problems/arranging-coins/
https://leetcode.com/problems/counting-bits/ //very upvouted
https://leetcode.com/problems/counting-bits/
https://leetcode.com/problems/linked-list-cycle/ //very upvoted
https://leetcode.com/problems/find-pivot-index/
https://leetcode.com/problems/find-the-distance-value-between-two-arrays/
https://leetcode.com/problems/partition-array-into-three-parts-with-equal-sum/
https://leetcode.com/problems/latest-time-by-replacing-hidden-digits/
https://leetcode.com/problems/count-odd-numbers-in-an-interval-range/
https://leetcode.com/problems/valid-mountain-array/ TOP TOP TOP
https://leetcode.com/problems/perfect-number/
https://leetcode.com/problems/shift-2d-grid/
https://leetcode.com/problems/reformat-the-string/
https://leetcode.com/problems/maximum-count-of-positive-integer-and-negative-integer/
https://leetcode.com/problems/left-and-right-sum-differences/
https://leetcode.com/problems/alternating-digit-sum/
https://leetcode.com/problems/watering-plants/ TOP TOP TOP
https://leetcode.com/problems/longest-palindrome/ TOP TOP TOP
https://leetcode.com/problems/get-maximum-in-generated-array/
https://leetcode.com/problems/range-sum-query-immutable/
https://leetcode.com/problems/find-the-pivot-integer/
https://leetcode.com/problems/majority-element/
https://leetcode.com/problems/power-of-four/
https://leetcode.com/problems/maximum-difference-between-increasing-elements/
https://leetcode.com/problems/minimum-index-sum-of-two-lists/
https://leetcode.com/problems/maximum-difference-between-increasing-elements/
https://leetcode.com/problems/divisor-game/
https://leetcode.com/problems/pascals-triangle-ii/
https://leetcode.com/problems/pascals-triangle/
https://leetcode.com/problems/rotate-string/
https://leetcode.com/problems/matrix-cells-in-distance-order/
https://leetcode.com/problems/minimum-cost-of-buying-candies-with-discount/
https://leetcode.com/problems/count-elements-with-strictly-smaller-and-greater-elements/
https://leetcode.com/problems/a-number-after-a-double-reversal/
https://leetcode.com/problems/longest-subsequence-with-limited-sum/
https://leetcode.com/problems/convert-the-temperature/
https://leetcode.com/problems/minimum-recolors-to-get-k-consecutive-black-blocks/
https://leetcode.com/problems/palindrome-linked-list/
https://leetcode.com/problems/find-the-k-beauty-of-a-number/
https://leetcode.com/problems/convert-binary-number-in-a-linked-list-to-integer/
https://leetcode.com/problems/maximum-product-of-three-numbers/ VERY VERY HARD WAY TO SOLVE
https://leetcode.com/problems/design-parking-system/
https://leetcode.com/problems/separate-the-digits-in-an-array/
https://leetcode.com/problems/count-the-digits-that-divide-a-number/ //num system convert
https://leetcode.com/problems/difference-between-element-sum-and-digit-sum-of-an-array/
eazy tree
https://leetcode.com/problems/balanced-binary-tree/
https://leetcode.com/problems/univalued-binary-tree/
https://leetcode.com/problems/maximum-depth-of-n-ary-tree/
https://leetcode.com/problems/sum-of-left-leaves/
https://leetcode.com/problems/second-minimum-node-in-a-binary-tree/
https://leetcode.com/problems/n-ary-tree-preorder-traversal/
https://leetcode.com/problems/binary-tree-preorder-traversal/
https://leetcode.com/problems/increasing-order-search-tree/
https://leetcode.com/problems/find-a-corresponding-node-of-a-binary-tree-in-a-clone-of-that-tree/
https://leetcode.com/problems/maximum-depth-of-binary-tree/
top eazy stack-queue
https://leetcode.com/problems/implement-stack-using-queues/
https://leetcode.com/problems/implement-queue-using-stacks/
top of tree
https://leetcode.com/problems/diameter-of-binary-tree/
https://leetcode.com/problems/minimum-distance-between-bst-nodes/ was hard
https://leetcode.com/problems/minimum-depth-of-binary-tree/
https://leetcode.com/problems/symmetric-tree/
https://leetcode.com/problems/subtree-of-another-tree/
https://leetcode.com/problems/invert-binary-tree/
https://leetcode.com/problems/path-sum/
palindrome
https://leetcode.com/problems/longest-palindromic-subsequence/
https://leetcode.com/problems/longest-palindromic-substring/
stack
https://leetcode.com/problems/validate-stack-sequences/
https://leetcode.com/problems/simplify-path/
https://leetcode.com/problems/removing-stars-from-a-string/
dp
https://leetcode.com/problems/best-time-to-buy-and-sell-stock/
https://leetcode.com/problems/word-break/
https://leetcode.com/problems/word-break/
https://leetcode.com/problems/house-robber/
https://leetcode.com/problems/best-time-to-buy-and-sell-stock/
https://leetcode.com/problems/unique-paths/
https://leetcode.com/problems/unique-paths-ii/
TRIE
https://leetcode.com/problems/design-add-and-search-words-data-structure/
https://leetcode.com/problems/implement-trie-prefix-tree/
2p
https://leetcode.com/problems/container-with-most-water/
list
https://leetcode.com/problems/copy-list-with-random-pointer/
https://leetcode.com/problems/delete-node-in-a-linked-list/
https://leetcode.com/problems/maximum-twin-sum-of-a-linked-list/
https://leetcode.com/problems/reorder-list/
https://leetcode.com/problems/swapping-nodes-in-a-linked-list/
https://leetcode.com/problems/remove-nth-node-from-end-of-list/
graph
https://leetcode.com/problems/clone-graph/
https://leetcode.com/problems/number-of-closed-islands/
https://leetcode.com/problems/number-of-enclaves/
https://leetcode.com/problems/all-paths-from-source-to-target/
https://leetcode.com/problems/number-of-islands/
https://leetcode.com/problems/clone-graph/
intervals
https://leetcode.com/problems/merge-intervals/
backtracking
https://leetcode.com/problems/iterator-for-combination/
https://leetcode.com/problems/letter-tile-possibilities/
https://leetcode.com/problems/permutations/
https://leetcode.com/problems/permutations-ii/
https://leetcode.com/problems/letter-case-permutation/
array
https://leetcode.com/problems/convert-an-array-into-a-2d-array-with-conditions/
https://leetcode.com/problems/minimize-maximum-pair-sum-in-array/
https://leetcode.com/problems/alert-using-same-key-card-three-or-more-times-in-a-one-hour-period/
https://leetcode.com/problems/queries-on-a-permutation-with-key/
https://leetcode.com/problems/arithmetic-subarrays/
https://leetcode.com/problems/subrectangle-queries/
https://leetcode.com/problems/number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold/
hashtable
https://leetcode.com/problems/finding-the-users-active-minutes/
math
https://leetcode.com/problems/queries-on-number-of-points-inside-a-circle/
https://leetcode.com/problems/count-number-of-distinct-integers-after-reverse-operations/
string greedy
https://leetcode.com/problems/optimal-partition-of-string/
string
https://leetcode.com/problems/zigzag-conversion/
https://leetcode.com/problems/minimum-number-of-steps-to-make-two-strings-anagram/
https://leetcode.com/problems/find-and-replace-pattern/
https://leetcode.com/problems/validate-ip-address/
https://leetcode.com/problems/masking-personal-information/
tree
https://leetcode.com/problems/flatten-binary-tree-to-linked-list/
binsearch
https://leetcode.com/problems/search-in-rotated-sorted-array/
https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/
https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/