1 月 2023

Last Updated on 2023-01-11 by Clay

題目

Given an undirected tree consisting of n vertices numbered from 0 to n-1, which has some apples in their vertices. You spend 1 second to walk over one edge of the tree. Return the minimum time in seconds you have to spend to collect all apples in the tree, starting at vertex 0 and coming back to this vertex.

Last Updated on 2023-01-11 by Clay

題目

Given the roots of two binary trees p and q, write a function to check if they are the same or not.

Two binary trees are considered the same if they are structurally identical, and the nodes have the same value.

… Read More »LeetCode: 144-Binary Tree Preorder Traversal 解題紀錄

Last Updated on 2023-01-04 by Clay

題目

You are given a 0-indexed integer array tasks, where tasks[i] represents the difficulty level of a task. In each round, you can complete either 2 or 3 tasks of the same difficulty level.

Last Updated on 2023-01-03 by Clay

題目

You are given an array of n strings strs, all of the same length.