LeetCode-TypeScript-JavaScript Solutions

This repository contains solutions for LeetCode problems implemented in TypeScript (JavaScript) and Python.

Overview

The purpose of this repository is to provide clear, efficient, and well-explained solutions for various LeetCode problems. Each solution is accompanied by detailed comments that explain the logic and approach used to solve the problem.

Languages

• TypeScript
• JavaScript
• Python
• Java

Usage

Each problem has its own directory, and within each problem's directory, you will find a solution file for both TypeScript and JavaScript. Feel free to explore and use these solutions to understand and solve LeetCode problems more effectively.

Contributing

Contributions are welcome! If you have a better solution or a solution to a problem that is not currently in the repository, feel free to make a pull request.

LeetCode Topics

Array

Problem Name	Difficulty
0001-two-sum	Easy
0033-search-in-rotated-sorted-array	Medium
0048-rotate-image	Medium
0153-find-minimum-in-rotated-sorted-array	Medium
0154-find-minimum-in-rotated-sorted-array-ii	Hard
0396-rotate-function	Medium
0486-predict-the-winner	Medium
0628-maximum-product-of-three-numbers	Easy
0874-walking-robot-simulation	Medium
0877-stone-game	Medium
1140-stone-game-ii	Medium
1288-remove-covered-intervals	Medium
1301-number-of-paths-with-max-score	Hard
1306-jump-game-iii	Medium
1331-rank-transform-of-an-array	Easy
1340-jump-game-v	Hard
1345-jump-game-iv	Hard
1386-cinema-seat-allocation	Medium
1391-check-if-there-is-a-valid-path-in-a-grid	Medium
1406-stone-game-iii	Hard
1464-maximum-product-of-two-elements-in-an-array	Easy
1536-minimum-swaps-to-arrange-a-binary-grid	Medium
1559-detect-cycles-in-2d-grid	Medium
1563-stone-game-v	Hard
1582-special-positions-in-a-binary-matrix	Easy
1594-maximum-non-negative-product-in-a-matrix	Medium
1665-minimum-initial-energy-to-finish-tasks	Hard
1674-minimum-moves-to-make-array-complementary	Medium
1722-minimize-hamming-distance-after-swap-operations	Medium
1727-largest-submatrix-with-rearrangements	Medium
1732-find-the-highest-altitude	Easy
1752-check-if-array-is-sorted-and-rotated	Easy
1840-maximum-building-height	Hard
1846-maximum-element-after-decreasing-and-rearranging	Medium
1848-minimum-distance-to-the-target-element	Easy
1855-maximum-distance-between-a-pair-of-values	Medium
1861-rotating-the-box	Medium
1878-get-biggest-three-rhombus-sums-in-a-grid	Medium
1886-determine-whether-matrix-can-be-obtained-by-rotation	Easy
1914-cyclically-rotating-a-grid	Medium
1967-number-of-strings-that-appear-as-substrings-in-word	Easy
1979-find-greatest-common-divisor-of-array	Easy
1980-find-unique-binary-string	Medium
2029-stone-game-ix	Medium
2033-minimum-operations-to-make-a-uni-value-grid	Medium
2078-two-furthest-houses-with-different-colors	Easy
2126-destroying-asteroids	Medium
2144-minimum-cost-of-buying-candies-with-discount	Easy
2161-partition-array-according-to-given-pivot	Medium
2196-create-binary-tree-from-descriptions	Medium
2213-longest-substring-of-one-repeating-character	Hard
2452-words-within-two-edits-of-dictionary	Medium
2463-minimum-total-distance-traveled	Hard
2515-shortest-distance-to-target-string-in-a-circular-array	Easy
2540-minimum-common-value	Easy
2553-separate-the-digits-in-an-array	Easy
2573-find-the-string-with-lcp	Hard
2574-left-and-right-sum-differences	Easy
2615-sum-of-distances	Medium
2657-find-the-prefix-common-array-of-two-arrays	Medium
2751-robot-collisions	Hard
2770-maximum-number-of-jumps-to-reach-the-last-index	Medium
2784-check-if-array-is-good	Easy
2812-find-the-safest-path-in-a-grid	Medium
2906-construct-product-matrix	Medium
2946-matrix-similarity-after-cyclic-shifts	Easy
2958-length-of-longest-subarray-with-at-most-k-frequency	Medium
2996-smallest-missing-integer-greater-than-sequential-prefix-sum	Easy
3020-find-the-maximum-number-of-elements-in-subset	Medium
3043-find-the-length-of-the-longest-common-prefix	Medium
3070-count-submatrices-with-top-left-element-and-sum-less-than-k	Medium
3093-longest-common-suffix-queries	Hard
3161-block-placement-queries	Hard
3212-count-submatrices-with-equal-frequency-of-x-and-y	Medium
3225-maximum-score-from-grid-operations	Hard
3286-find-a-safe-walk-through-a-grid	Medium
3296-minimum-number-of-seconds-to-make-mountain-height-zero	Medium
3300-minimum-element-after-replacement-with-digit-sum	Easy
3312-sorted-gcd-pair-queries	Hard
3336-find-the-number-of-subsequences-with-equal-gcd	Hard
3418-maximum-amount-of-money-robot-can-earn	Medium
3464-maximize-the-distance-between-points-on-a-square	Hard
3471-find-the-largest-almost-missing-integer	Easy
3488-closest-equal-element-queries	Medium
3501-maximize-active-section-with-trade-ii	Hard
3513-number-of-unique-xor-triplets-i	Medium
3514-number-of-unique-xor-triplets-ii	Medium
3532-path-existence-queries-in-a-graph-i	Medium
3534-path-existence-queries-in-a-graph-ii	Hard
3546-equal-sum-grid-partition-i	Medium
3548-equal-sum-grid-partition-ii	Hard
3559-number-of-ways-to-assign-edge-weights-ii	Hard
3567-minimum-absolute-difference-in-sliding-submatrix	Medium
3620-network-recovery-pathways	Hard
3629-minimum-jumps-to-reach-end-via-prime-teleportation	Medium
3633-earliest-finish-time-for-land-and-water-rides-i	Easy
3635-earliest-finish-time-for-land-and-water-rides-ii	Medium
3643-flip-square-submatrix-vertically	Easy
3653-xor-after-range-multiplication-queries-i	Medium
3655-xor-after-range-multiplication-queries-ii	Hard
3660-jump-game-ix	Medium
3661-maximum-walls-destroyed-by-robots	Hard
3689-maximum-total-subarray-value-i	Medium
3691-maximum-total-subarray-value-ii	Hard
3702-longest-subsequence-with-non-zero-bitwise-xor	Medium
3731-find-missing-elements	Easy
3737-count-subarrays-with-majority-element-i	Medium
3739-count-subarrays-with-majority-element-ii	Hard
3740-minimum-distance-between-three-equal-elements-i	Easy
3741-minimum-distance-between-three-equal-elements-ii	Medium
3742-maximum-path-score-in-a-grid	Medium
3761-minimum-absolute-distance-between-mirror-pairs	Medium
3838-weighted-word-mapping	Easy
3867-sum-of-gcd-of-formed-pairs	Medium

Greedy

Problem Name	Difficulty
1081-smallest-subsequence-of-distinct-characters	Medium
1386-cinema-seat-allocation	Medium
1536-minimum-swaps-to-arrange-a-binary-grid	Medium
1665-minimum-initial-energy-to-finish-tasks	Hard
1727-largest-submatrix-with-rearrangements	Medium
1846-maximum-element-after-decreasing-and-rearranging	Medium
2029-stone-game-ix	Medium
2078-two-furthest-houses-with-different-colors	Easy
2126-destroying-asteroids	Medium
2144-minimum-cost-of-buying-candies-with-discount	Easy
2573-find-the-string-with-lcp	Hard
3014-minimum-number-of-pushes-to-type-word-i	Easy
3016-minimum-number-of-pushes-to-type-word-ii	Medium
3296-minimum-number-of-seconds-to-make-mountain-height-zero	Medium
3302-find-the-lexicographically-smallest-valid-sequence	Medium
3348-smallest-divisible-digit-product-ii	Hard
3474-lexicographically-smallest-generated-string	Hard
3534-path-existence-queries-in-a-graph-ii	Hard
3600-maximize-spanning-tree-stability-with-upgrades	Hard
3633-earliest-finish-time-for-land-and-water-rides-i	Easy
3635-earliest-finish-time-for-land-and-water-rides-ii	Medium
3689-maximum-total-subarray-value-i	Medium
3691-maximum-total-subarray-value-ii	Hard

Matrix

Problem Name	Difficulty
0048-rotate-image	Medium
1301-number-of-paths-with-max-score	Hard
1391-check-if-there-is-a-valid-path-in-a-grid	Medium
1536-minimum-swaps-to-arrange-a-binary-grid	Medium
1559-detect-cycles-in-2d-grid	Medium
1582-special-positions-in-a-binary-matrix	Easy
1594-maximum-non-negative-product-in-a-matrix	Medium
1727-largest-submatrix-with-rearrangements	Medium
1861-rotating-the-box	Medium
1878-get-biggest-three-rhombus-sums-in-a-grid	Medium
1886-determine-whether-matrix-can-be-obtained-by-rotation	Easy
1914-cyclically-rotating-a-grid	Medium
2033-minimum-operations-to-make-a-uni-value-grid	Medium
2573-find-the-string-with-lcp	Hard
2812-find-the-safest-path-in-a-grid	Medium
2906-construct-product-matrix	Medium
2946-matrix-similarity-after-cyclic-shifts	Easy
3070-count-submatrices-with-top-left-element-and-sum-less-than-k	Medium
3212-count-submatrices-with-equal-frequency-of-x-and-y	Medium
3225-maximum-score-from-grid-operations	Hard
3286-find-a-safe-walk-through-a-grid	Medium
3418-maximum-amount-of-money-robot-can-earn	Medium
3546-equal-sum-grid-partition-i	Medium
3548-equal-sum-grid-partition-ii	Hard
3567-minimum-absolute-difference-in-sliding-submatrix	Medium
3643-flip-square-submatrix-vertically	Easy
3742-maximum-path-score-in-a-grid	Medium

String

Problem Name	Difficulty
0657-robot-return-to-origin	Easy
1081-smallest-subsequence-of-distinct-characters	Medium
1189-maximum-number-of-balloons	Easy
1320-minimum-distance-to-type-a-word-using-two-fingers	Hard
1358-number-of-substrings-containing-all-three-characters	Medium
1415-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n	Medium
1545-find-kth-bit-in-nth-binary-string	Medium
1758-minimum-changes-to-make-alternating-binary-string	Easy
1784-check-if-binary-string-has-at-most-one-segment-of-ones	Easy
1871-jump-game-vii	Medium
1888-minimum-number-of-flips-to-make-the-binary-string-alternating	Medium
1967-number-of-strings-that-appear-as-substrings-in-word	Easy
1980-find-unique-binary-string	Medium
2075-decode-the-slanted-ciphertext	Medium
2213-longest-substring-of-one-repeating-character	Hard
2452-words-within-two-edits-of-dictionary	Medium
2515-shortest-distance-to-target-string-in-a-circular-array	Easy
2573-find-the-string-with-lcp	Hard
2833-furthest-point-from-origin	Easy
2839-check-if-strings-can-be-made-equal-with-operations-i	Easy
2840-check-if-strings-can-be-made-equal-with-operations-ii	Medium
3014-minimum-number-of-pushes-to-type-word-i	Easy
3016-minimum-number-of-pushes-to-type-word-ii	Medium
3043-find-the-length-of-the-longest-common-prefix	Medium
3090-maximum-length-substring-with-two-occurrences	Easy
3093-longest-common-suffix-queries	Hard
3120-count-the-number-of-special-characters-i	Easy
3121-count-the-number-of-special-characters-ii	Medium
3302-find-the-lexicographically-smallest-valid-sequence	Medium
3348-smallest-divisible-digit-product-ii	Hard
3474-lexicographically-smallest-generated-string	Hard
3499-maximize-active-section-with-trade-i	Medium
3501-maximize-active-section-with-trade-ii	Hard
3517-smallest-palindromic-rearrangement-i	Medium
3518-smallest-palindromic-rearrangement-ii	Hard
3612-process-string-with-special-operations-i	Medium
3614-process-string-with-special-operations-ii	Hard
3756-concatenate-non-zero-digits-and-multiply-by-sum-ii	Medium
3838-weighted-word-mapping	Easy

Recursion

Problem Name	Difficulty
0486-predict-the-winner	Medium
1545-find-kth-bit-in-nth-binary-string	Medium

Simulation

Problem Name	Difficulty
0657-robot-return-to-origin	Easy
0874-walking-robot-simulation	Medium
1545-find-kth-bit-in-nth-binary-string	Medium
1914-cyclically-rotating-a-grid	Medium
2069-walking-robot-simulation-ii	Medium
2075-decode-the-slanted-ciphertext	Medium
2161-partition-array-according-to-given-pivot	Medium
2553-separate-the-digits-in-an-array	Easy
2751-robot-collisions	Hard
2946-matrix-similarity-after-cyclic-shifts	Easy
3612-process-string-with-special-operations-i	Medium
3614-process-string-with-special-operations-ii	Hard
3653-xor-after-range-multiplication-queries-i	Medium
3838-weighted-word-mapping	Easy
3867-sum-of-gcd-of-formed-pairs	Medium

Dynamic Programming

Problem Name	Difficulty
0396-rotate-function	Medium
0486-predict-the-winner	Medium
0788-rotated-digits	Medium
0877-stone-game	Medium
1140-stone-game-ii	Medium
1301-number-of-paths-with-max-score	Hard
1320-minimum-distance-to-type-a-word-using-two-fingers	Hard
1340-jump-game-v	Hard
1406-stone-game-iii	Hard
1510-stone-game-iv	Hard
1563-stone-game-v	Hard
1594-maximum-non-negative-product-in-a-matrix	Medium
1871-jump-game-vii	Medium
1888-minimum-number-of-flips-to-make-the-binary-string-alternating	Medium
2463-minimum-total-distance-traveled	Hard
2573-find-the-string-with-lcp	Hard
2770-maximum-number-of-jumps-to-reach-the-last-index	Medium
3129-find-all-possible-stable-binary-arrays-i	Medium
3130-find-all-possible-stable-binary-arrays-ii	Hard
3225-maximum-score-from-grid-operations	Hard
3302-find-the-lexicographically-smallest-valid-sequence	Medium
3336-find-the-number-of-subsequences-with-equal-gcd	Hard
3418-maximum-amount-of-money-robot-can-earn	Medium
3534-path-existence-queries-in-a-graph-ii	Hard
3559-number-of-ways-to-assign-edge-weights-ii	Hard
3620-network-recovery-pathways	Hard
3660-jump-game-ix	Medium
3661-maximum-walls-destroyed-by-robots	Hard
3699-number-of-zigzag-arrays-i	Hard
3700-number-of-zigzag-arrays-ii	Hard
3742-maximum-path-score-in-a-grid	Medium
3751-total-waviness-of-numbers-in-range-i	Medium
3753-total-waviness-of-numbers-in-range-ii	Hard

Sliding Window

Problem Name	Difficulty
1358-number-of-substrings-containing-all-three-characters	Medium
1871-jump-game-vii	Medium
1888-minimum-number-of-flips-to-make-the-binary-string-alternating	Medium
2958-length-of-longest-subarray-with-at-most-k-frequency	Medium
3090-maximum-length-substring-with-two-occurrences	Easy

Hash Table

Problem Name	Difficulty
0001-two-sum	Easy
0874-walking-robot-simulation	Medium
1189-maximum-number-of-balloons	Easy
1331-rank-transform-of-an-array	Easy
1345-jump-game-iv	Hard
1358-number-of-substrings-containing-all-three-characters	Medium
1386-cinema-seat-allocation	Medium
1674-minimum-moves-to-make-array-complementary	Medium
1980-find-unique-binary-string	Medium
2196-create-binary-tree-from-descriptions	Medium
2540-minimum-common-value	Easy
2615-sum-of-distances	Medium
2657-find-the-prefix-common-array-of-two-arrays	Medium
2784-check-if-array-is-good	Easy
2840-check-if-strings-can-be-made-equal-with-operations-ii	Medium
2958-length-of-longest-subarray-with-at-most-k-frequency	Medium
2996-smallest-missing-integer-greater-than-sequential-prefix-sum	Easy
3016-minimum-number-of-pushes-to-type-word-ii	Medium
3020-find-the-maximum-number-of-elements-in-subset	Medium
3043-find-the-length-of-the-longest-common-prefix	Medium
3090-maximum-length-substring-with-two-occurrences	Easy
3120-count-the-number-of-special-characters-i	Easy
3121-count-the-number-of-special-characters-ii	Medium
3312-sorted-gcd-pair-queries	Hard
3471-find-the-largest-almost-missing-integer	Easy
3488-closest-equal-element-queries	Medium
3518-smallest-palindromic-rearrangement-ii	Hard
3532-path-existence-queries-in-a-graph-i	Medium
3548-equal-sum-grid-partition-ii	Hard
3629-minimum-jumps-to-reach-end-via-prime-teleportation	Medium
3731-find-missing-elements	Easy
3737-count-subarrays-with-majority-element-i	Medium
3739-count-subarrays-with-majority-element-ii	Hard
3740-minimum-distance-between-three-equal-elements-i	Easy
3741-minimum-distance-between-three-equal-elements-ii	Medium
3761-minimum-absolute-distance-between-mirror-pairs	Medium

Backtracking

Problem Name	Difficulty
1415-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n	Medium
1980-find-unique-binary-string	Medium
3348-smallest-divisible-digit-product-ii	Hard

Prefix Sum

Problem Name	Difficulty
1140-stone-game-ii	Medium
1674-minimum-moves-to-make-array-complementary	Medium
1732-find-the-highest-altitude	Easy
1871-jump-game-vii	Medium
1878-get-biggest-three-rhombus-sums-in-a-grid	Medium
2574-left-and-right-sum-differences	Easy
2615-sum-of-distances	Medium
2906-construct-product-matrix	Medium
3070-count-submatrices-with-top-left-element-and-sum-less-than-k	Medium
3129-find-all-possible-stable-binary-arrays-i	Medium
3130-find-all-possible-stable-binary-arrays-ii	Hard
3212-count-submatrices-with-equal-frequency-of-x-and-y	Medium
3225-maximum-score-from-grid-operations	Hard
3312-sorted-gcd-pair-queries	Hard
3546-equal-sum-grid-partition-i	Medium
3548-equal-sum-grid-partition-ii	Hard
3699-number-of-zigzag-arrays-i	Hard
3737-count-subarrays-with-majority-element-i	Medium
3739-count-subarrays-with-majority-element-ii	Hard
3756-concatenate-non-zero-digits-and-multiply-by-sum-ii	Medium

Bit Manipulation

Problem Name	Difficulty
1009-complement-of-base-10-integer	Easy
1386-cinema-seat-allocation	Medium
2657-find-the-prefix-common-array-of-two-arrays	Medium
3513-number-of-unique-xor-triplets-i	Medium
3514-number-of-unique-xor-triplets-ii	Medium
3534-path-existence-queries-in-a-graph-ii	Hard
3559-number-of-ways-to-assign-edge-weights-ii	Hard
3702-longest-subsequence-with-non-zero-bitwise-xor	Medium

Binary Search

Problem Name	Difficulty
0033-search-in-rotated-sorted-array	Medium
0153-find-minimum-in-rotated-sorted-array	Medium
0154-find-minimum-in-rotated-sorted-array-ii	Hard
1855-maximum-distance-between-a-pair-of-values	Medium
2540-minimum-common-value	Easy
2812-find-the-safest-path-in-a-grid	Medium
3161-block-placement-queries	Hard
3296-minimum-number-of-seconds-to-make-mountain-height-zero	Medium
3312-sorted-gcd-pair-queries	Hard
3464-maximize-the-distance-between-points-on-a-square	Hard
3488-closest-equal-element-queries	Medium
3501-maximize-active-section-with-trade-ii	Hard
3532-path-existence-queries-in-a-graph-i	Medium
3534-path-existence-queries-in-a-graph-ii	Hard
3600-maximize-spanning-tree-stability-with-upgrades	Hard
3620-network-recovery-pathways	Hard
3633-earliest-finish-time-for-land-and-water-rides-i	Easy
3635-earliest-finish-time-for-land-and-water-rides-ii	Medium
3661-maximum-walls-destroyed-by-robots	Hard

Union-Find

Problem Name	Difficulty
1391-check-if-there-is-a-valid-path-in-a-grid	Medium
1559-detect-cycles-in-2d-grid	Medium
1722-minimize-hamming-distance-after-swap-operations	Medium
2492-minimum-score-of-a-path-between-two-cities	Medium
2573-find-the-string-with-lcp	Hard
2685-count-the-number-of-complete-components	Medium
2812-find-the-safest-path-in-a-grid	Medium
3532-path-existence-queries-in-a-graph-i	Medium
3600-maximize-spanning-tree-stability-with-upgrades	Hard

Graph Theory

Problem Name	Difficulty
2492-minimum-score-of-a-path-between-two-cities	Medium
2685-count-the-number-of-complete-components	Medium
3286-find-a-safe-walk-through-a-grid	Medium
3310-remove-methods-from-project	Medium
3532-path-existence-queries-in-a-graph-i	Medium
3534-path-existence-queries-in-a-graph-ii	Hard
3600-maximize-spanning-tree-stability-with-upgrades	Hard
3620-network-recovery-pathways	Hard

Minimum Spanning Tree

Problem Name	Difficulty
3600-maximize-spanning-tree-stability-with-upgrades	Hard

Math

Problem Name	Difficulty
0048-rotate-image	Medium
0396-rotate-function	Medium
0486-predict-the-winner	Medium
0628-maximum-product-of-three-numbers	Easy
0788-rotated-digits	Medium
0877-stone-game	Medium
1140-stone-game-ii	Medium
1344-angle-between-hands-of-a-clock	Medium
1406-stone-game-iii	Hard
1510-stone-game-iv	Hard
1563-stone-game-v	Hard
1622-fancy-sequence	Hard
1840-maximum-building-height	Hard
1878-get-biggest-three-rhombus-sums-in-a-grid	Medium
1979-find-greatest-common-divisor-of-array	Easy
2029-stone-game-ix	Medium
2033-minimum-operations-to-make-a-uni-value-grid	Medium
2946-matrix-similarity-after-cyclic-shifts	Easy
3014-minimum-number-of-pushes-to-type-word-i	Easy
3296-minimum-number-of-seconds-to-make-mountain-height-zero	Medium
3300-minimum-element-after-replacement-with-digit-sum	Easy
3312-sorted-gcd-pair-queries	Hard
3336-find-the-number-of-subsequences-with-equal-gcd	Hard
3345-smallest-divisible-digit-product-i	Easy
3348-smallest-divisible-digit-product-ii	Hard
3464-maximize-the-distance-between-points-on-a-square	Hard
3513-number-of-unique-xor-triplets-i	Medium
3514-number-of-unique-xor-triplets-ii	Medium
3518-smallest-palindromic-rearrangement-ii	Hard
3536-maximum-product-of-two-digits	Easy
3558-number-of-ways-to-assign-edge-weights-i	Medium
3559-number-of-ways-to-assign-edge-weights-ii	Hard
3629-minimum-jumps-to-reach-end-via-prime-teleportation	Medium
3658-gcd-of-odd-and-even-sums	Easy
3700-number-of-zigzag-arrays-ii	Hard
3751-total-waviness-of-numbers-in-range-i	Medium
3753-total-waviness-of-numbers-in-range-ii	Hard
3754-concatenate-non-zero-digits-and-multiply-by-sum-i	Easy
3756-concatenate-non-zero-digits-and-multiply-by-sum-ii	Medium
3761-minimum-absolute-distance-between-mirror-pairs	Medium
3783-mirror-distance-of-an-integer	Easy
3867-sum-of-gcd-of-formed-pairs	Medium

Heap (Priority Queue)

Problem Name	Difficulty
1464-maximum-product-of-two-elements-in-an-array	Easy
1878-get-biggest-three-rhombus-sums-in-a-grid	Medium
2812-find-the-safest-path-in-a-grid	Medium
3286-find-a-safe-walk-through-a-grid	Medium
3296-minimum-number-of-seconds-to-make-mountain-height-zero	Medium
3620-network-recovery-pathways	Hard
3691-maximum-total-subarray-value-ii	Hard

Design

Problem Name	Difficulty
1622-fancy-sequence	Hard
2069-walking-robot-simulation-ii	Medium

Segment Tree

Problem Name	Difficulty
1622-fancy-sequence	Hard
2213-longest-substring-of-one-repeating-character	Hard
3161-block-placement-queries	Hard
3501-maximize-active-section-with-trade-ii	Hard
3691-maximum-total-subarray-value-ii	Hard
3737-count-subarrays-with-majority-element-i	Medium
3739-count-subarrays-with-majority-element-ii	Hard

Sorting

Problem Name	Difficulty
0628-maximum-product-of-three-numbers	Easy
1288-remove-covered-intervals	Medium
1331-rank-transform-of-an-array	Easy
1340-jump-game-v	Hard
1464-maximum-product-of-two-elements-in-an-array	Easy
1665-minimum-initial-energy-to-finish-tasks	Hard
1727-largest-submatrix-with-rearrangements	Medium
1840-maximum-building-height	Hard
1846-maximum-element-after-decreasing-and-rearranging	Medium
1878-get-biggest-three-rhombus-sums-in-a-grid	Medium
2033-minimum-operations-to-make-a-uni-value-grid	Medium
2126-destroying-asteroids	Medium
2144-minimum-cost-of-buying-candies-with-discount	Easy
2463-minimum-total-distance-traveled	Hard
2751-robot-collisions	Hard
2784-check-if-array-is-good	Easy
2840-check-if-strings-can-be-made-equal-with-operations-ii	Medium
2996-smallest-missing-integer-greater-than-sequential-prefix-sum	Easy
3016-minimum-number-of-pushes-to-type-word-ii	Medium
3464-maximize-the-distance-between-points-on-a-square	Hard
3517-smallest-palindromic-rearrangement-i	Medium
3534-path-existence-queries-in-a-graph-ii	Hard
3536-maximum-product-of-two-digits	Easy
3567-minimum-absolute-difference-in-sliding-submatrix	Medium
3633-earliest-finish-time-for-land-and-water-rides-i	Easy
3635-earliest-finish-time-for-land-and-water-rides-ii	Medium
3661-maximum-walls-destroyed-by-robots	Hard
3731-find-missing-elements	Easy
3867-sum-of-gcd-of-formed-pairs	Medium

Two Pointers

Problem Name	Difficulty
0061-rotate-list	Medium
1855-maximum-distance-between-a-pair-of-values	Medium
1861-rotating-the-box	Medium
2095-delete-the-middle-node-of-a-linked-list	Medium
2161-partition-array-according-to-given-pivot	Medium
2540-minimum-common-value	Easy
3302-find-the-lexicographically-smallest-valid-sequence	Medium
3534-path-existence-queries-in-a-graph-ii	Hard
3633-earliest-finish-time-for-land-and-water-rides-i	Easy
3635-earliest-finish-time-for-land-and-water-rides-ii	Medium
3643-flip-square-submatrix-vertically	Easy
3867-sum-of-gcd-of-formed-pairs	Medium

Enumeration

Problem Name	Difficulty
1291-sequential-digits	Medium
3020-find-the-maximum-number-of-elements-in-subset	Medium
3345-smallest-divisible-digit-product-i	Easy
3499-maximize-active-section-with-trade-i	Medium
3514-number-of-unique-xor-triplets-ii	Medium
3546-equal-sum-grid-partition-i	Medium
3548-equal-sum-grid-partition-ii	Hard
3751-total-waviness-of-numbers-in-range-i	Medium

String Matching

Problem Name	Difficulty
3474-lexicographically-smallest-generated-string	Hard

Stack

Problem Name	Difficulty
1081-smallest-subsequence-of-distinct-characters	Medium
2751-robot-collisions	Hard

Divide and Conquer

Problem Name	Difficulty
3653-xor-after-range-multiplication-queries-i	Medium
3655-xor-after-range-multiplication-queries-ii	Hard
3737-count-subarrays-with-majority-element-i	Medium
3739-count-subarrays-with-majority-element-ii	Hard

Depth-First Search

Problem Name	Difficulty
1306-jump-game-iii	Medium
1391-check-if-there-is-a-valid-path-in-a-grid	Medium
1559-detect-cycles-in-2d-grid	Medium
1722-minimize-hamming-distance-after-swap-operations	Medium
2492-minimum-score-of-a-path-between-two-cities	Medium
2685-count-the-number-of-complete-components	Medium
3310-remove-methods-from-project	Medium
3558-number-of-ways-to-assign-edge-weights-i	Medium
3559-number-of-ways-to-assign-edge-weights-ii	Hard

Trie

Problem Name	Difficulty
2452-words-within-two-edits-of-dictionary	Medium
3043-find-the-length-of-the-longest-common-prefix	Medium
3093-longest-common-suffix-queries	Hard

Counting

Problem Name	Difficulty
1189-maximum-number-of-balloons	Easy
2029-stone-game-ix	Medium
2833-furthest-point-from-origin	Easy
3016-minimum-number-of-pushes-to-type-word-ii	Medium
3312-sorted-gcd-pair-queries	Hard
3518-smallest-palindromic-rearrangement-ii	Hard
3737-count-subarrays-with-majority-element-i	Medium

Geometry

Problem Name	Difficulty
3464-maximize-the-distance-between-points-on-a-square	Hard

Breadth-First Search

Problem Name	Difficulty
1306-jump-game-iii	Medium
1345-jump-game-iv	Hard
1391-check-if-there-is-a-valid-path-in-a-grid	Medium
1559-detect-cycles-in-2d-grid	Medium
2492-minimum-score-of-a-path-between-two-cities	Medium
2685-count-the-number-of-complete-components	Medium
2812-find-the-safest-path-in-a-grid	Medium
3286-find-a-safe-walk-through-a-grid	Medium
3310-remove-methods-from-project	Medium
3629-minimum-jumps-to-reach-end-via-prime-teleportation	Medium

Linked List

Problem Name	Difficulty
0061-rotate-list	Medium
2095-delete-the-middle-node-of-a-linked-list	Medium

Number Theory

Problem Name	Difficulty
1979-find-greatest-common-divisor-of-array	Easy
3312-sorted-gcd-pair-queries	Hard
3336-find-the-number-of-subsequences-with-equal-gcd	Hard
3348-smallest-divisible-digit-product-ii	Hard
3629-minimum-jumps-to-reach-end-via-prime-teleportation	Medium
3658-gcd-of-odd-and-even-sums	Easy
3867-sum-of-gcd-of-formed-pairs	Medium

Binary Indexed Tree

Problem Name	Difficulty
3161-block-placement-queries	Hard

Tree

Problem Name	Difficulty
2196-create-binary-tree-from-descriptions	Medium
3558-number-of-ways-to-assign-edge-weights-i	Medium
3559-number-of-ways-to-assign-edge-weights-ii	Hard

Binary Tree

Problem Name	Difficulty
2196-create-binary-tree-from-descriptions	Medium

Merge Sort

Problem Name	Difficulty
3737-count-subarrays-with-majority-element-i	Medium
3739-count-subarrays-with-majority-element-ii	Hard

Shortest Path

Problem Name	Difficulty
3286-find-a-safe-walk-through-a-grid	Medium
3620-network-recovery-pathways	Hard

Topological Sort

Problem Name	Difficulty
3620-network-recovery-pathways	Hard

Combinatorics

Problem Name	Difficulty
3312-sorted-gcd-pair-queries	Hard
3518-smallest-palindromic-rearrangement-ii	Hard

Monotonic Stack

Problem Name	Difficulty
1081-smallest-subsequence-of-distinct-characters	Medium

Counting Sort

Problem Name	Difficulty
3517-smallest-palindromic-rearrangement-i	Medium

Game Theory

Problem Name	Difficulty
0486-predict-the-winner	Medium
0877-stone-game	Medium
1140-stone-game-ii	Medium
1406-stone-game-iii	Hard
1510-stone-game-iv	Hard
1563-stone-game-v	Hard
2029-stone-game-ix	Medium

Minimax

Problem Name	Difficulty
1140-stone-game-ii	Medium
1510-stone-game-iv	Hard
2029-stone-game-ix	Medium

Zero-Sum Game

Problem Name	Difficulty
1140-stone-game-ii	Medium
1510-stone-game-iv	Hard
2029-stone-game-ix	Medium

Nim Game

Problem Name	Difficulty
1510-stone-game-iv	Hard
2029-stone-game-ix	Medium

Sprague–Grundy Theorem

Problem Name	Difficulty
1510-stone-game-iv	Hard

Ordered Set

Problem Name	Difficulty
2213-longest-substring-of-one-repeating-character	Hard