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Minimum Depth of Binary Tree

Minimum Depth of Binary TreeGiven a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 提示 解題應用

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Balanced Binary Tree

Balanced Binary TreeGiven a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of ever

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Binary Tree Level Order Traversal II

Binary Tree Level Order Traversal IIGiven a binary tree, return the bottom-up level order traversal of its nodes’ values. (ie, from left to right, level by level from leaf to root). For example:Given

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Maximum Depth of Binary Tree

Maximum Depth of Binary TreeGiven a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 提示 解題應用

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Binary Tree Level Order Traversal

Binary Tree Level Order TraversalGiven a binary tree, return the level order traversal of its nodes’ values. (ie, from left to right, level by level). For example:Given binary tree [3,9,20,null,null,

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Symmetric Tree

Symmetric TreeGiven a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree [1,2,2,3,4,4,3] is symmetric: 12345 1 / \ 2 2 / \ /

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Same Tree

Same TreeGiven two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 提示

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Merge Sorted Array

Merge Sorted ArrayGGiven two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note: You may assume that nums1 has enough space (size that is greater or equal to m +

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Remove Duplicates from Sorted List

Remove Duplicates from Sorted ListGiven a sorted linked list, delete all duplicates such that each element appear only once. For example:12Given 1->1->2, return 1->2.Given 1->1->2->