You are given an integer array weight of length n, representing the weights of n parcels arranged in a straight line. A shipment is defined as a contiguous subarray of parcels. A shipment is considered balanced if the weight of the last parcel is strictly less than the maximum weight among all parcels in that shipment.
Select a set of non-overlapping, contiguous, balanced shipments such that each parcel appears in at most one shipment (parcels may remain unshipped).
\n\nReturn the maximum possible number of balanced shipments that can be formed.
\n\n\n
Example 1:
\n\nInput: weight = [2,5,1,4,3]
\n\nOutput: 2
\n\nExplanation:
\n\nWe can form the maximum of two balanced shipments as follows:
\n\n[2, 5, 1]\n\n\t[4, 3]\n\tIt is impossible to partition the parcels to achieve more than two balanced shipments, so the answer is 2.
\nExample 2:
\n\nInput: weight = [4,4]
\n\nOutput: 0
\n\nExplanation:
\n\nNo balanced shipment can be formed in this case:
\n\n[4, 4] has maximum weight 4 and the last parcel's weight is also 4, which is not strictly less. Thus, it's not balanced.[4] have the last parcel weight equal to the maximum parcel weight, thus not balanced.As there is no way to form even one balanced shipment, the answer is 0.
\n\n
Constraints:
\n\n2 <= n <= 1051 <= weight[i] <= 109给你一个长度为 n 的整数数组 weight，表示按直线排列的 n 个包裹的重量。装运 定义为包裹的一个连续子数组。如果一个装运满足以下条件，则称其为 平衡装运：最后一个包裹的重量 严格小于 该装运中所有包裹中 最大重量 。
选择若干个 不重叠 的连续平衡装运，并满足 每个包裹最多出现在一次装运中（部分包裹可以不被装运）。
\n\n返回 可以形成的平衡装运的最大数量 。
\n\n\n\n
示例 1:
\n\n输入: weight = [2,5,1,4,3]
\n\n输出: 2
\n\n解释:
\n\n我们可以形成最多两个平衡装运：
\n\n[2, 5, 1]\n\n\t[4, 3]\n\t无法通过其他方式划分包裹获得超过两个平衡装运，因此答案是 2。
\n示例 2:
\n\n输入: weight = [4,4]
\n\n输出: 0
\n\n解释:
\n\n在这种情况下无法形成平衡装运：
\n\n[4, 4] 的最大重量为 4，而最后一个包裹的重量也是 4，不严格小于最大重量，因此不是平衡的。[4] 中，最后一个包裹的重量等于最大重量，因此也不是平衡的。由于无法形成任何平衡装运，答案是 0。
\n\n\n
提示:
\n\n2 <= n <= 1051 <= weight[i] <= 109i the nearest previous index j with weight[j] > weight[i] (set j = -1 if none).",
"Then set dp[i] = best[j] + 1 (using best[-1] = 0), and update best[i] = max(best[i-1], dp[i]); the result is best[n-1]."
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