Veritas des Liberty

摘要： You are given two jugs with capacities x and y litres. There is an infinite amount of water supply available. You need to determine whether it is poss 阅读全文

摘要： You are given an array x of n positive numbers. You start at point (0,0) and moves x[0] metres to the north, then x[1] metres to the west, x[2] metres 阅读全文

摘要： There are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you toggle every 阅读全文

摘要： Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n. Example: Approach #1: Math. [Jav 阅读全文

摘要： Implement a basic calculator to evaluate a simple expression string. The expression string may contain open ( and closing parentheses ), the plus + or 阅读全文

摘要： We are given that the string "abc" is valid. From any valid string V, we may split V into two pieces X and Y such that X + Y (X concatenated with Y) i 阅读全文

摘要： You have an array of logs. Each log is a space delimited string of words. For each log, the first word in each log is an alphanumeric identifier. Then 阅读全文

摘要： We are given two arrays A and B of words. Each word is a string of lowercase letters. Now, say that word b is a subset of word a if every letter in b  阅读全文

摘要： A string S of lowercase letters is given. Then, we may make any number of moves. In each move, we choose one of the first K letters (starting from the 阅读全文

摘要： Given a balanced parentheses string S, compute the score of the string based on the following rule: () has score 1 AB has score A + B, where A and B a 阅读全文