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g0001_0100.s0053_maximum_subarray.readme.md Maven / Gradle / Ivy

53\. Maximum Subarray

Easy

Given an integer array `nums`, find the contiguous subarray (containing at least one number) which has the largest sum and return _its sum_.

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

**Example 1:**

**Input:** nums = [-2,1,-3,4,-1,2,1,-5,4]

**Output:** 6

**Explanation:** [4,-1,2,1] has the largest sum = 6. 

**Example 2:**

**Input:** nums = [1]

**Output:** 1 

**Example 3:**

**Input:** nums = [5,4,-1,7,8]

**Output:** 23 

**Constraints:**

*   1 <= nums.length <= 105
*   -104 <= nums[i] <= 104

**Follow up:** If you have figured out the `O(n)` solution, try coding another solution using the **divide and conquer** approach, which is more subtle.