摘要：
题目： Suppose you have a random list of people standing in a queue. Each person is described by a pair of integers (h, k), where h is the height of the 阅读全文
摘要：
题目： Given a non-negative integer num represented as a string, remove k digits from the number so that the new number is the smallest possible. Note: T 阅读全文
摘要：
题目： Given a non-negative integer num represented as a string, remove k digits from the number so that the new number is the smallest possible. Note: T 阅读全文