[2018-10-28] [LeetCode-Week8] 746. Min Cost Climbing Stairs 动态规划
https://leetcode.com/problems/min-cost-climbing-stairs/description/Onastaircase,thei-thstephassomenon-negativecostcost[i]assigned(0indexed).Onceyoupaythecost,youcaneitherclimboneortwosteps.Youneedtofi