发信人: pacific1997(彩虹桥)
整理人: agx(2001-05-07 10:41:17), 站内信件
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以下是一段密码, 每个按钮的意思代表跳往的位置,例如 1L代表向左移动一位, 1U代表向上移动1位,1R代表向右移动1位,1D代表向下移动1位.要求最终回到**位置,并且每个按钮都必须按一次,那么第一步应该先按哪一个呢?
4D 1D 3D 3D **
1U 2R 2R 1U 4L
1D 2D 1U 1R 2L
1R 1U 2R 1U 3U
4R 4U 4U 1L 1L
(这是我翻译的,为更准确理解大家不妨看原文~)
Here is an unusual safe. To reach ** each and every button must be pressed once only in the correct order. The number of moves and the direction is marked on each button, thus 1L means one move to the left and 1U means one move upwards. Which button is the first you must press?
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我读得书少,你唔好呃我~ |
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