Leetcode 1688. Count of Matches in Tournament

class Solution:
    def numberOfMatches(self, n: int) -> int:
        total = 0
        while n != 1:
            matches = n // 2
            total += matches
            if n % 2 == 0:
                n = matches
            else:
                n = matches + 1
        return total
        # return n - 1