# 1463. Cherry Pickup II

<https://leetcode.com/problems/cherry-pickup-ii>

## Description

Given a `rows x cols` matrix `grid` representing a field of cherries. Each cell in `grid` represents the number of cherries that you can collect.

You have two robots that can collect cherries for you, Robot #1 is located at the top-left corner (0,0) , and Robot #2 is located at the top-right corner (0, cols-1) of the grid.

Return the maximum number of cherries collection using both robots  by following the rules below:

* From a cell (i,j), robots can move to cell (i+1, j-1) , (i+1, j) or (i+1, j+1).
* When any robot is passing through a cell, It picks it up all cherries, and the cell becomes an empty cell (0).
* When both robots stay on the same cell, only one of them takes the cherries.
* Both robots cannot move outside of the grid at any moment.
* Both robots should reach the bottom row in the `grid`.

**Example 1:**

![](https://assets.leetcode.com/uploads/2020/04/29/sample_1_1802.png)

```
**Input:** grid = [[3,1,1],[2,5,1],[1,5,5],[2,1,1]]
**Output:** 24
**Explanation:** Path of robot #1 and #2 are described in color green and blue respectively.
Cherries taken by Robot #1, (3 + 2 + 5 + 2) = 12.
Cherries taken by Robot #2, (1 + 5 + 5 + 1) = 12.
Total of cherries: 12 + 12 = 24.
```

**Example 2:**

![](https://assets.leetcode.com/uploads/2020/04/23/sample_2_1802.png)

```
**Input:** grid = [[1,0,0,0,0,0,1],[2,0,0,0,0,3,0],[2,0,9,0,0,0,0],[0,3,0,5,4,0,0],[1,0,2,3,0,0,6]]
**Output:** 28
**Explanation:** Path of robot #1 and #2 are described in color green and blue respectively.
Cherries taken by Robot #1, (1 + 9 + 5 + 2) = 17.
Cherries taken by Robot #2, (1 + 3 + 4 + 3) = 11.
Total of cherries: 17 + 11 = 28.
```

**Example 3:**

```
**Input:** grid = [[1,0,0,3],[0,0,0,3],[0,0,3,3],[9,0,3,3]]
**Output:** 22
```

**Example 4:**

```
**Input:** grid = [[1,1],[1,1]]
**Output:** 4
```

**Constraints:**

* `rows == grid.length`
* `cols == grid[i].length`
* `2 <= rows, cols <= 70`
* `0 <= grid[i][j] <= 100`

## ac

```java
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://jaywin.gitbook.io/leetcode/solutions/1463-cherry-pickup-ii.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.