OJ: LeetCode 862 Shortest Subarray with Sum at Least K - 单调队列
题目862.ShortestSubarraywithSumatLeastKGivenanintegerarraynumsandanintegerk,returnthelengthoftheshortestnon-emptysubarrayofnumswithasumofatleastk.Ifthereisnosuchsubarray,return-1.Asubarrayisacontiguousp