week3-challenge.md

Problem 1

Return the length of the shortest, non-empty, contiguous subarray of A with sum at least K.

If there is no non-empty subarray with sum at least K, return -1.

A defanged IP address replaces every period "." with "[.]".

Example 1:

Input: A = [1], K = 1 Output: 1

Example 2:

Input: A = [1,2], K = 4 Output: -1

Example 3:

Input: A = [2,-1,2], K = 3 Output: 3

Notes:

• -1 <= A.length <= 50000
• -10 ^ 5 <= A[i] <= 10 ^ 5
• 1 <= K <= 10 ^ 9