Description

oky from ##algorithms has shared a below list of LeetCode problems. Prioritize these problems and try to write a solutions for them first.

Binary tree basics

• https://leetcode.com/problems/maximum-depth-of-binary-tree/ PR #14
• https://leetcode.com/problems/binary-tree-paths/ PR #16
• https://leetcode.com/problems/sum-of-root-to-leaf-binary-numbers/ PR #17

Getting somewhere with binary trees

• https://leetcode.com/problems/maximum-depth-of-n-ary-tree/ PR #18
• https://leetcode.com/problems/sort-colors/ (in-place!) PR #22
• https://leetcode.com/problems/binary-tree-level-order-traversal/ PR #23
• https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/ PR #29

Combinations / brute force

• https://leetcode.com/problems/combinations/ PR #25
• https://leetcode.com/problems/combination-sum/ PR #26
• https://leetcode.com/problems/combination-sum-ii/ PR #27
• https://leetcode.com/problems/letter-combinations-of-a-phone-number/ (challenge) PR #29

DFS / BFS

• https://leetcode.com/problems/number-of-islands/ PR #30
• https://leetcode.com/problems/redundant-connection/
• https://leetcode.com/problems/network-delay-time/ (solve with dijkstra this time) PR #35
• https://leetcode.com/problems/cheapest-flights-within-k-stops/ (modify what you are putting into the queue to give you enough information to solve this)
• https://leetcode.com/problems/flood-fill/description/ PR #31

Stacks:

• https://leetcode.com/problems/valid-parentheses/ PR #24
• https://leetcode.com/problems/valid-parenthesis-string/ (a bit trickier)
• https://leetcode.com/problems/evaluate-reverse-polish-notation/ PR #38