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Shortest Subarray with Sum at Least K

Given an integer array nums and an integer k, return the length of the shortest non-empty subarray of nums with a sum of at least k.

Given an integer array nums and an integer k, return the length of the shortest non-empty subarray of nums with a sum of at least k. If there is no such subarray, return -1.

A subarray is a contiguous part of an array.

Shortest Subarray with Sum at Least K diagram

Example 1

Input: nums = [1], k = 1

Output: 1

Example 2

Input: nums = [1,2], k = 4

Output: -1

Example 3

Input: nums = [2,-1,2], k = 3

Output: 3

Constraints

  • 1 <= nums.length <= 10^5
  • -10^5 <= nums[i] <= 10^5
  • 1 <= k <= 10^9

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