本文深入探讨了双指针算法的实现细节，通过具体案例解释了如何使用两个指针来处理数组中的元素，以达到高效查找和处理的目的。文章详细说明了双指针算法的工作原理，包括初始化条件、边界条件的设定以及如何在遍历过程中更新指针位置，为读者提供了清晰的算法思路。
Not as hard as imagine, we can assume holding the number and will go the furthest one after scan all index we can go. Use two pointer to store current index which we can handle. We continue process it until right point reach or exceed the end point.
Error:
- Have some confuse the ending condition, set right >= n - 1 at first, actually we need to set right > n - 1.
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