There is a new alien language which uses the latin alphabet. However, the order among letters are unknown to you. You receive a list of non-empty words from the dictionary, where words are sorted lexicographically by the rules of this new language. Derive the order of letters in this language.
In some cases you would like to share some configuration information, such as API keys, database credentials etc, between different Jupyter notebooks without exposing sensitive information, you could achieve this by using environment variables. You can create a .env file in the same directory as your Jupyter notebook on your
This blog post just talk about how to install Stable Diffusion web UI on Mac if you would like to run it locally. 1. Install Homebrew if you have not installed it before by running the following command in terminal /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/
144. Binary Tree Preorder Traversal Given a binary tree, return the preorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [1,2,3]. Note: Recursive solution is trivial, could you do it iteratively? class Solution { func preorderTraversal(_ root: TreeNode?) -&
378. Kth Smallest Element in a Sorted Matrix Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct
601. Flatten 2D Vector Implement an iterator to flatten a 2d vector. Example Given 2d vector = [ [1,2], [3], [4,5,6] ] By calling next repeatedly until hasNext returns false, the order of elements returned by next should be: [1,2,3,4,5,6]. public class Vector2D implements Iterator&
94. Binary Tree Inorder Traversal Given a binary tree, return the inorder traversal of its nodes' values. For example: Given binary tree [1,null,2,3], 1 \ 2 / 3 return [1,3,2]. Note: Recursive solution is trivial, could you do it iteratively? class Solution { func inorderTraversal(_ root: TreeNode?
76. Minimum Window Substring LintCode-32.Minimum Window Substring Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n). For example, S = "ADOBECODEBANC" T = "ABC" Minimum window is "BANC"
278. First Bad Version 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 developed based on the previous version, all the versions after a bad version are also bad.
208. Implement Trie (Prefix Tree) LintCode-442.Implement Trie Implement a trie with insert, search, and startsWith methods. Note: You may assume that all inputs are consist of lowercase letters a-z. class TrieNode { private var children: [TrieNode?] = [] public var isEnd = false init() { self.children = Array(repeating: nil, count: 26) self.isEnd
79. Word Search LintCode-123.Word Search Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically neighboring. The same letter cell may not be
224. Basic Calculator Implement a basic calculator to evaluate a simple expression string. The expression string may contain open ( and closing parentheses ), the plus + or minus sign -, non-negative integers and empty spaces . You may assume that the given expression is always valid. Some examples: "1 + 1" = 2
