登山俱乐部欲攀登某高山,有高山队员若干,每个队员最多可负载 M 天的给养,每人每天所消耗的给养相同。假定上下山速度相等,从山脚到顶峰有 N 天的路程,其中M>N+1。只要在 N 天内全队有一个队员登上顶峰.并且在2N天内所有参加登山的队员安全返回山脚,就算此次登山成功。并规定:参加登山的队员同时同地出发;给养 Climbing clubs want to climb a mountain, there are a number of mountain players, each team can be up to M days of support, consumption per day per person the same supply. Assuming the same speed up and down the mountain, there are N days from the foot of the mountain to the summit, where M> N + 1. As long as the N-day team has a team to climb to the top, and in 2N days to participate in all the members of the mountaineering safely returned to the foothills, even if the mountaineering success. And provides: participate in mountaineering team members at the same time starting; to support