Leetcode

LeetCode Topics

Array

0001-two-sum
0004-median-of-two-sorted-arrays
0066-plus-one
0198-house-robber
0485-max-consecutive-ones
0740-delete-and-earn
0746-min-cost-climbing-stairs
0840-magic-squares-in-grid
0960-delete-columns-to-make-sorted-iii
0961-n-repeated-element-in-size-2n-array
1351-count-negative-numbers-in-a-sorted-matrix
1458-max-dot-product-of-two-subsequences
1470-shuffle-the-array
1929-concatenation-of-array
2529-maximum-count-of-positive-integer-and-negative-integer
3075-maximize-happiness-of-selected-children

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0740-delete-and-earn
0756-pyramid-transition-matrix
0840-magic-squares-in-grid
0961-n-repeated-element-in-size-2n-array

Linked List

0002-add-two-numbers

Math

0002-add-two-numbers
0062-unique-paths
0066-plus-one
0070-climbing-stairs
0509-fibonacci-number
0840-magic-squares-in-grid
1137-n-th-tribonacci-number

Recursion

0002-add-two-numbers
0509-fibonacci-number

String

0003-longest-substring-without-repeating-characters
0756-pyramid-transition-matrix
0960-delete-columns-to-make-sorted-iii

Sliding Window

0003-longest-substring-without-repeating-characters

Binary Search

0004-median-of-two-sorted-arrays
1351-count-negative-numbers-in-a-sorted-matrix
2529-maximum-count-of-positive-integer-and-negative-integer

Divide and Conquer

0004-median-of-two-sorted-arrays

Dynamic Programming

0062-unique-paths
0070-climbing-stairs
0198-house-robber
0509-fibonacci-number
0740-delete-and-earn
0746-min-cost-climbing-stairs
0960-delete-columns-to-make-sorted-iii
1137-n-th-tribonacci-number
1458-max-dot-product-of-two-subsequences

Combinatorics

0062-unique-paths

Memoization

0070-climbing-stairs
0509-fibonacci-number
1137-n-th-tribonacci-number

Backtracking

0756-pyramid-transition-matrix

Bit Manipulation

0756-pyramid-transition-matrix

Matrix

0840-magic-squares-in-grid
1351-count-negative-numbers-in-a-sorted-matrix

Tree

1161-maximum-level-sum-of-a-binary-tree

Depth-First Search

1161-maximum-level-sum-of-a-binary-tree

Breadth-First Search

1161-maximum-level-sum-of-a-binary-tree

Binary Tree

1161-maximum-level-sum-of-a-binary-tree

Simulation

1929-concatenation-of-array

Counting

2529-maximum-count-of-positive-integer-and-negative-integer

Greedy

3075-maximize-happiness-of-selected-children

Sorting

3075-maximize-happiness-of-selected-children