An island, five kilometers away in the sea is connected to the land by two ways, three hanging bridges A, B, and C and three water routes 1, 2, and 3. The managing authority offers services to people for coming in and for going out by officially managed vehicles on both ways. When it snows, morning service on B is delayed. When it rains or snows, services on A, route 2 and route 3 are delayed in both the morning and afternoon when temperature falls below 30 degrees Fahrenheit afternoon service is cancelled on either A or on the route 3, but not both. When the temperature rises over 90 degree Fahrenheit, the afternoon service is cancelled in either on C or on the route 3 but not both. When the service on A is delayed or cancelled, service on the C, which connects A is delayed. When service on route 3 is cancelled, service on B, which connects the route 3 is delayed.