A collection of LeetCode questions to ace the coding interview! - Created using LeetHub v2

LeetCode Topics

Array

0018-4sum
0075-sort-colors
0136-single-number
0209-minimum-size-subarray-sum
0486-predict-the-winner
0643-maximum-average-subarray-i
0704-binary-search
0877-stone-game
0905-sort-array-by-parity
0907-sum-of-subarray-minimums
0922-sort-array-by-parity-ii
0977-squares-of-a-sorted-array
1140-stone-game-ii
1365-how-many-numbers-are-smaller-than-the-current-number
1386-cinema-seat-allocation
1406-stone-game-iii
1563-stone-game-v
1872-stone-game-viii
1920-build-array-from-permutation
1929-concatenation-of-array
2029-stone-game-ix
2091-removing-minimum-and-maximum-from-array
2213-longest-substring-of-one-repeating-character
2948-make-lexicographically-smallest-array-by-swapping-elements
2958-length-of-longest-subarray-with-at-most-k-frequency
2996-smallest-missing-integer-greater-than-sequential-prefix-sum
3069-distribute-elements-into-two-arrays-i
3116-kth-smallest-amount-with-single-denomination-combination
3471-find-the-largest-almost-missing-integer
3568-minimum-moves-to-clean-the-classroom
3702-longest-subsequence-with-non-zero-bitwise-xor
3718-smallest-missing-multiple-of-k
3731-find-missing-elements
3875-construct-uniform-parity-array-i
3876-construct-uniform-parity-array-ii
3903-smallest-stable-index-i
3904-smallest-stable-index-ii

Dynamic Programming

0115-distinct-subsequences
0486-predict-the-winner
0877-stone-game
0907-sum-of-subarray-minimums
0940-distinct-subsequences-ii
1140-stone-game-ii
1406-stone-game-iii
1510-stone-game-iv
1563-stone-game-v
1872-stone-game-viii
3302-find-the-lexicographically-smallest-valid-sequence

Stack

0907-sum-of-subarray-minimums

Monotonic Stack

0907-sum-of-subarray-minimums

Math

0412-fizz-buzz
0486-predict-the-winner
0877-stone-game
1140-stone-game-ii
1406-stone-game-iii
1510-stone-game-iv
1563-stone-game-v
1872-stone-game-viii
1927-sum-game
2029-stone-game-ix
3116-kth-smallest-amount-with-single-denomination-combination
3345-smallest-divisible-digit-product-i
3348-smallest-divisible-digit-product-ii
3622-check-divisibility-by-digit-sum-and-product
3870-count-commas-in-range
3871-count-commas-in-range-ii
3875-construct-uniform-parity-array-i
3876-construct-uniform-parity-array-ii

String

0115-distinct-subsequences
0345-reverse-vowels-of-a-string
0412-fizz-buzz
0940-distinct-subsequences-ii
1456-maximum-number-of-vowels-in-a-substring-of-given-length
1876-substrings-of-size-three-with-distinct-characters
1927-sum-game
2213-longest-substring-of-one-repeating-character
2904-shortest-and-lexicographically-smallest-beautiful-string
3016-minimum-number-of-pushes-to-type-word-ii
3090-maximum-length-substring-with-two-occurrences
3302-find-the-lexicographically-smallest-valid-sequence
3348-smallest-divisible-digit-product-ii
3720-lexicographically-smallest-permutation-greater-than-target
3734-lexicographically-smallest-palindromic-permutation-greater-than-target

Simulation

0412-fizz-buzz
1920-build-array-from-permutation
1929-concatenation-of-array
3069-distribute-elements-into-two-arrays-i

Hash Table

1365-how-many-numbers-are-smaller-than-the-current-number
1386-cinema-seat-allocation
1876-substrings-of-size-three-with-distinct-characters
2958-length-of-longest-subarray-with-at-most-k-frequency
2996-smallest-missing-integer-greater-than-sequential-prefix-sum
3016-minimum-number-of-pushes-to-type-word-ii
3090-maximum-length-substring-with-two-occurrences
3471-find-the-largest-almost-missing-integer
3568-minimum-moves-to-clean-the-classroom
3718-smallest-missing-multiple-of-k
3720-lexicographically-smallest-permutation-greater-than-target
3731-find-missing-elements

Greedy

1386-cinema-seat-allocation
1927-sum-game
2029-stone-game-ix
2091-removing-minimum-and-maximum-from-array
3016-minimum-number-of-pushes-to-type-word-ii
3302-find-the-lexicographically-smallest-valid-sequence
3348-smallest-divisible-digit-product-ii
3720-lexicographically-smallest-permutation-greater-than-target

Sorting

0018-4sum
0075-sort-colors
0905-sort-array-by-parity
0922-sort-array-by-parity-ii
0977-squares-of-a-sorted-array
1365-how-many-numbers-are-smaller-than-the-current-number
2948-make-lexicographically-smallest-array-by-swapping-elements
2996-smallest-missing-integer-greater-than-sequential-prefix-sum
3016-minimum-number-of-pushes-to-type-word-ii
3731-find-missing-elements

Counting

1876-substrings-of-size-three-with-distinct-characters
2029-stone-game-ix
3016-minimum-number-of-pushes-to-type-word-ii
3720-lexicographically-smallest-permutation-greater-than-target

Recursion

0021-merge-two-sorted-lists
0486-predict-the-winner

Game Theory

0486-predict-the-winner
0877-stone-game
1140-stone-game-ii
1406-stone-game-iii
1510-stone-game-iv
1563-stone-game-v
1872-stone-game-viii
1927-sum-game
2029-stone-game-ix

Counting Sort

1365-how-many-numbers-are-smaller-than-the-current-number

Two Pointers

0018-4sum
0075-sort-colors
0345-reverse-vowels-of-a-string
0905-sort-array-by-parity
0922-sort-array-by-parity-ii
0977-squares-of-a-sorted-array
3302-find-the-lexicographically-smallest-valid-sequence
3734-lexicographically-smallest-palindromic-permutation-greater-than-target

Depth-First Search

3310-remove-methods-from-project

Breadth-First Search

3310-remove-methods-from-project
3568-minimum-moves-to-clean-the-classroom

Graph Theory

3310-remove-methods-from-project

Enumeration

3345-smallest-divisible-digit-product-i
3720-lexicographically-smallest-permutation-greater-than-target
3734-lexicographically-smallest-palindromic-permutation-greater-than-target

Backtracking

3348-smallest-divisible-digit-product-ii

Number Theory

3116-kth-smallest-amount-with-single-denomination-combination
3348-smallest-divisible-digit-product-ii

Binary Search

0209-minimum-size-subarray-sum
0704-binary-search
3116-kth-smallest-amount-with-single-denomination-combination

Minimax

1140-stone-game-ii
1510-stone-game-iv
1872-stone-game-viii
2029-stone-game-ix

Prefix Sum

0209-minimum-size-subarray-sum
1140-stone-game-ii
1872-stone-game-viii
3903-smallest-stable-index-i
3904-smallest-stable-index-ii

Zero-Sum Game

1140-stone-game-ii
1510-stone-game-iv
1872-stone-game-viii
2029-stone-game-ix

Nim Game

1510-stone-game-iv
2029-stone-game-ix

Sprague–Grundy Theorem

1510-stone-game-iv

Bit Manipulation

0136-single-number
1386-cinema-seat-allocation
3116-kth-smallest-amount-with-single-denomination-combination
3568-minimum-moves-to-clean-the-classroom
3702-longest-subsequence-with-non-zero-bitwise-xor

Quicksort

0075-sort-colors

Bubble Sort

0075-sort-colors

Sliding Window

0209-minimum-size-subarray-sum
0643-maximum-average-subarray-i
1456-maximum-number-of-vowels-in-a-substring-of-given-length
1876-substrings-of-size-three-with-distinct-characters
2904-shortest-and-lexicographically-smallest-beautiful-string
2958-length-of-longest-subarray-with-at-most-k-frequency
3090-maximum-length-substring-with-two-occurrences

Segment Tree

2213-longest-substring-of-one-repeating-character

Ordered Set

2213-longest-substring-of-one-repeating-character

Database

0176-second-highest-salary
0182-duplicate-emails

Linked List

0021-merge-two-sorted-lists
2058-find-the-minimum-and-maximum-number-of-nodes-between-critical-points

Combinatorics

3116-kth-smallest-amount-with-single-denomination-combination

Union-Find

2948-make-lexicographically-smallest-array-by-swapping-elements

Matrix

3568-minimum-moves-to-clean-the-classroom