H_usky的博客

Go Home(思维）descriptionThere is a kangaroo at coordinate 0 on an infinite number line that runs from left to right, at time 0. During the period between time i−1 and time i, the kangaroo can either sta...

GameProblem DescriptionAlice and Bob are playing a game.The game is played on a set of positive integers from 1 to n.In one step, the player can choose a positive integer from the set, and erase...