题解 | #只出现一次的牛II#

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param nums int整型一维数组 
# @return int整型一维数组
#
class Solution:
    def findSingleCowsII(self , nums: List[int]) -> List[int]:
        # write code here
        list2 = []
        list3 = []
        for i in nums:
            if i not in list2:
                list2.append(i)
            else:
                list3.append(i)
        for i in list3:
            if i in list2:
                list2.remove(i)
        list2.sort()
        return list2