You are given an array a[0…n−1] of n integers. This array is called a “valley” if there exists exactly one subarray a[l…r] such that:
0≤l≤r≤n−1, alal1al2⋯ar, l0 or al−1>al, rn−1 or ar<ar1. Here are three examples:
The first image shows…
摘要
论文链接Challenging the Long Tail Recommendation
针对长尾推荐问题,提出三种基于图的算法 1)Hitting Time algorithm 2)Absorbing Time algorithm 3)Absorbing Cost algorithm
算法
1、算法问题定义
三种算法都是基于…