john现有h个小时的空闲时间，他打算去钓鱼。john钓鱼的地方共有n个湖，所有的湖沿着一条单向路顺序排列-john the existing h hours of free time, he planned to go fishing. john where a total of n-fishing lake, all of the lakes along the order of a one-way road
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