摘要：
See the picture below. You are given , and . is parallel to . You are also given the area ratio between and . You have to find the value of . 水题； 说一下题 阅读全文
摘要：
This is the tale of Zephyr, the greatest time traveler the world will never know. Even those who are aware of Zephyr's existence know very little abou 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 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 shou 阅读全文