摘要：
You have a browser of one tab where you start on the homepage and you can visit another url, get back in the history number of steps or move forward i 阅读全文
摘要：
We have n jobs, where every job is scheduled to be done from startTime[i] to endTime[i], obtaining a profit of profit[i]. You're given the startTime, 阅读全文
摘要：
We are given some website visits: the user with name username[i] visited the website website[i] at time timestamp[i]. A 3-sequence is a list of websit 阅读全文