要去相信，没有到不了的明天

题目描述 In the television program "Shopping Street" of CCTV-2, two people, A and B are guessing the price of a given item. You are asked to decide whose price is closer to the real price. 输入

题目描述 A lucky number is made by the following rules: Given a positive integer sequence {x | 1 <= x <= n}. From the first number, delete the last one in every 2 numbers. Select the minimum that has

题目描述 Your task is to judge whether a regular polygon can be drawn only by straightedge and compass. The length of the straightedge is infinite. The width of the compass is infinite. The straight