# 1031. Maximum Sum of Two Non-Overlapping Subarrays

<https://leetcode.com/problems/maximum-sum-of-two-non-overlapping-subarrays>

## Description

Given an integer array `nums` and two integers `firstLen` and `secondLen`, return *the maximum sum of elements in two non-overlapping **subarrays** with lengths* `firstLen` *and* `secondLen`.

The array with length `firstLen` could occur before or after the array with length `secondLen`, but they have to be non-overlapping.

A **subarray** is a **contiguous** part of an array.

**Example 1:**

```
**Input:** nums = [0,6,5,2,2,5,1,9,4], firstLen = 1, secondLen = 2
**Output:** 20
**Explanation:** One choice of subarrays is [9] with length 1, and [6,5] with length 2.
```

**Example 2:**

```
**Input:** nums = [3,8,1,3,2,1,8,9,0], firstLen = 3, secondLen = 2
**Output:** 29
**Explanation:** One choice of subarrays is [3,8,1] with length 3, and [8,9] with length 2.
```

**Example 3:**

```
**Input:** nums = [2,1,5,6,0,9,5,0,3,8], firstLen = 4, secondLen = 3
**Output:** 31
**Explanation:** One choice of subarrays is [5,6,0,9] with length 4, and [3,8] with length 3.
```

**Constraints:**

* `1 <= firstLen, secondLen <= 1000`
* `2 <= firstLen + secondLen <= 1000`
* `firstLen + secondLen <= nums.length <= 1000`
* `0 <= nums[i] <= 1000`

## 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/1031-maximum-sum-of-two-non-overlapping-subarrays.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.