题目介绍:"Bahnhofe" (Railway Stations)地铁站
规则:
将格子纵横相连形成一条回路,使其经过每一格。而且必须从小到大依次穿过所有数字(最后一个数字要和1相连),当经过数字时,需笔直经过不能转弯,所有回路交叉成+的均已标出,其他地方不可交叉。)
Draw a closed, connected loop in the grid. The path travels horizontally and vertically from the
center of one square to the next.The path crosses itself at the marked intersections (crosses), and only at these crosses. It visits every other square exactly once.The train stations (indicated by numbers) must be passed through in strict numerical order. The path is not allowed to turn at a station, but must continue straight through the station's square.
例题:
题目
根据规则可以得到绿色的线条(注意左下角绿色的叉),接着可以推出红色的,然后是黄色的,最后是黑色的,
红色的线条都是不成立的(根据题目规则),绿色的线条是一定可以得到的,黄色是可能的(但是黄色的起点和终点是确定的),
绿色的可以确定,黄色的表示起点和终点的位置,
下面进行微调即可,大家可以试试看能不能得出结果。