LeetCode in TypeScript
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.
Solution
function maxSubArray(nums: number[]): number {
let curSum: number = nums[0]
let maxSum: number = nums[0]
for (let i = 1; i < nums.length; i++) {
curSum = Math.max(nums[i], nums[i] + curSum)
maxSum = Math.max(curSum, maxSum)
}
return maxSum
}
export { maxSubArray }