摘要： Running a taxi station is not all that simple. Apart from the obvious demand for a centralised coordination of the cabs in order to pick up the custom 阅读全文

摘要： Asteroids POJ - 3041 Bessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an N x N grid (1 <= N <= 500). The grid 阅读全文

摘要： An arithmetic progression is such a non-empty sequence of numbers where the difference between any two successive numbers is constant. This constant n 阅读全文

摘要： Acm is a clever boy, and he developed a new game form the old Stone-Forfex-Cloth game. In this game, a number of children sit in a circle, each one sh 阅读全文