There is a biker going on a road trip. The road trip consists of n + 1 points at different altitudes. The biker starts his trip on point 0 with altitude equal 0.
You are given an integer array gain of length n where gain[i] is the net gain in altitude between points i and i + 1 for all (0 <= i < n). Return the highest altitude of a point.
\n
Example 1:
\n\n\nInput: gain = [-5,1,5,0,-7]\nOutput: 1\nExplanation: The altitudes are [0,-5,-4,1,1,-6]. The highest is 1.\n\n\n
Example 2:
\n\n\nInput: gain = [-4,-3,-2,-1,4,3,2]\nOutput: 0\nExplanation: The altitudes are [0,-4,-7,-9,-10,-6,-3,-1]. The highest is 0.\n\n\n
\n
Constraints:
\n\nn == gain.length1 <= n <= 100-100 <= gain[i] <= 100有一个自行车手打算进行一场公路骑行，这条路线总共由 n + 1 个不同海拔的点组成。自行车手从海拔为 0 的点 0 开始骑行。
给你一个长度为 n 的整数数组 gain ，其中 gain[i] 是点 i 和点 i + 1 的 净海拔高度差（0 <= i < n）。请你返回 最高点的海拔 。
\n\n
示例 1：
\n\n\n输入：gain = [-5,1,5,0,-7]\n输出：1\n解释：海拔高度依次为 [0,-5,-4,1,1,-6] 。最高海拔为 1 。\n\n\n
示例 2：
\n\n\n输入：gain = [-4,-3,-2,-1,4,3,2]\n输出：0\n解释：海拔高度依次为 [0,-4,-7,-9,-10,-6,-3,-1] 。最高海拔为 0 。\n\n\n
\n\n
提示：
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