Code from my leetcode and hackerrank solutions.

LeetCode Topics

Array

0011-container-with-most-water
0015-3sum
0036-valid-sudoku
0128-longest-consecutive-sequence
0167-two-sum-ii-input-array-is-sorted
0238-product-of-array-except-self
1390-four-divisors
1975-maximum-matrix-sum

Prefix Sum

0238-product-of-array-except-self

Hash Table

0036-valid-sudoku
0128-longest-consecutive-sequence
0567-permutation-in-string
0865-smallest-subtree-with-all-the-deepest-nodes

Matrix

0036-valid-sudoku
1975-maximum-matrix-sum

Two Pointers

0011-container-with-most-water
0015-3sum
0167-two-sum-ii-input-array-is-sorted
0567-permutation-in-string

String

0567-permutation-in-string

Sliding Window

0567-permutation-in-string

Union Find

0128-longest-consecutive-sequence

Math

1390-four-divisors

Greedy

0011-container-with-most-water
1975-maximum-matrix-sum

Stack

0094-binary-tree-inorder-traversal
0145-binary-tree-postorder-traversal

Tree

0094-binary-tree-inorder-traversal
0102-binary-tree-level-order-traversal
0145-binary-tree-postorder-traversal
0563-binary-tree-tilt
0865-smallest-subtree-with-all-the-deepest-nodes
1161-maximum-level-sum-of-a-binary-tree
1339-maximum-product-of-splitted-binary-tree

Depth-First Search

0094-binary-tree-inorder-traversal
0145-binary-tree-postorder-traversal
0563-binary-tree-tilt
0865-smallest-subtree-with-all-the-deepest-nodes
1161-maximum-level-sum-of-a-binary-tree
1339-maximum-product-of-splitted-binary-tree

Binary Tree

0094-binary-tree-inorder-traversal
0102-binary-tree-level-order-traversal
0145-binary-tree-postorder-traversal
0563-binary-tree-tilt
0865-smallest-subtree-with-all-the-deepest-nodes
1161-maximum-level-sum-of-a-binary-tree
1339-maximum-product-of-splitted-binary-tree

Breadth-First Search

0102-binary-tree-level-order-traversal
0865-smallest-subtree-with-all-the-deepest-nodes
1161-maximum-level-sum-of-a-binary-tree

Sorting

0015-3sum

Binary Search

0167-two-sum-ii-input-array-is-sorted