#
# 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
#
class Solution:
    def findRepeatNum(self , nums: List[int]) -> int:
        # write code here
        nums.sort()
        pre = nums[0]
        for cur in nums[1:]:
            if pre^cur==0:
                return pre
            else:
                pre = cur