leetcode
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grandyang
Provide all my solutions and explanations in Chinese for all the Leetcode coding problems.
Given a binary tree with the following rules: 1. `root.val == 0` 2. If `treeNode.val == x` and `treeNode.left != null`, then `treeNode.left.val == 2 * x + 1` 3....
Given a 2D `grid` of size `m x n` and an integer `k`. You need to shift the `grid` `k` times. In one shift operation: * Element at `grid[i][j]` moves...
A password is considered strong if below conditions are all met: 1. It has at least 6 characters and at most 20 characters. 2. It must contain at least one...
Given an integer array `nums` and an integer `k`, return `true` if it is possible to divide this array into `k` non-empty subsets whose sums are all equal. Example 1:...
Given an `n x n` array of integers `matrix`, return _the minimum sum of any falling path through_ `matrix`. A falling path starts at any element in the first row...
Given an integer array `nums` and an integer `k`, return `true` _if_`nums` _has a continuous subarray of size at least two whose elements sum up to a multiple of_ `k`...
You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is...
You are given two jugs with capacities `jug1Capacity` and `jug2Capacity` liters. There is an infinite amount of water supply available. Determine whether it is possible to measure exactly `targetCapacity` liters...
Given a tree, rearrange the tree in in-order so that the leftmost node in the tree is now the root of the tree, and every node has no left child...
Given a list of non negative integers, arrange them such that they form the largest number. Example 1: Input: [10,2] Output: "210" Example 2: Input: [3,30,34,5,9] Output: "9534330" Note: The...