#827 · #1526 · Minimum Number of Increments on Subarrays to Form a Target Array(形成目标数组的子数组最少增加次数)

You are given an integer array target. Starting from an array of zeros, in one operation you choose a subarray and increment every element in it by 1. Return the minimum number of operations to form target. Constraints: 1 <= target.length <= 10^5, 0 <= target[i] <= 10^5.