天行健，君子以自强不息

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. Example 1:Input: A = [1], K = 1Ou...

Given an array nums, there is a sliding window of size k which is moving from the very left of the array to the very right. You can only see the k numbers in the window. Each time the sliding window ...