求出n叉路口需要几盏信号灯来管理交通。可以通行的方向及个数和不能同时通行的两个方向及个数均由用户输入。最后输出信号灯的数量以及每个信号灯管理的可以同时通行方向。-N fork junctions obtained several signal lights to manage traffic. Can access the direction and the number and can not be accepted by both the direction and the number o