[1,3,1,3,2],2
7
七个牛连续子数组是 [1,3] , [3,1] , [1,3] , [3,2] , [1,3,1] , [3,1,3] , [1,3,1,3]
[1,1,4,5,1,4],2
5
[1,4],[4,5],[5,1],[1,4],[1,1,4]