class Solution(object):
    def findMaximumXOR(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        head=(None,None)
        for num in nums:
            node=head
            for bit in range(32)[::-1]:
                chd=int(bool(num&(1<<bit))) if node[chd]="=None:" newnode="(None,None)" node="NewNode" else: maxxor="0" for num in nums: curxor="0" bit range(32)[::-1]: chd="int(bool(num&(1<<bit)))" node[1^chd]: curxor|="1<<bit" return < code></bit)))>