DIV1 250pt 题意:电视目前停留在第100台,有一个遥控器,可以向上或向下换台(需要按键一次),也可以按一些数字,然后直接跳到该台(需要按键次数等于数字数,不需要按确定键).但是,这个遥控一些数字键是坏的不能按.问要换到x台最少需要按多少次.x <= 500000. 解法:直接搜索.可能用bfs会快点,但我更喜欢写dfs就用了. tag:search // BEGIN CUT HERE /* */ // END CUT HERE #line 7 "BrokenButtons.cpp…
Problem Statement The least common multiple (denoted "lcm") of a non-empty sequence of positive integers is the smallest positive integer that is divisible by each of them. For example, lcm(2)=2, lcm(4,6)=12, and lcm(1,2,3,4,5)=60. Alice had a p…