# # # @param arr int整型一维数组 the array # @return int整型 # class Solution: def maxLength(self , arr ): # write code here li = [] ret = 0 for i in arr: if i in li: ret = max(ret, len(li)) start = li.index(i) li = li[start+1:] li.append(i) return max(ret, len(li))