摘要：
Say you have an array for which the ith element is the price of a given stock on day i.Design an algorithm to find the maximum profit. You may complet... 阅读全文
摘要：
Validate if a given string is numeric. Some examples:"0" => true" 0.1 " => true"abc" => false"1 a" => false"2e10" => trueNote: It is intended for t... 阅读全文
摘要：
Given an array of words and a length L, format the text such that each line has exactly L characters and is fully (left and right) justified.You shoul... 阅读全文
摘要：
Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation is counted as 1 step.)You have t... 阅读全文