2025-08-22 10:44:20 +0000 UTC

class Solution:
    def findChampion(self, grid: List[List[int]]) -> int:
        loses = [False] * len(grid)
        for row in range(len(grid)):
            for col in range(len(grid)):
                if row == col:
                    continue
                val = grid[row][col]
                if val == 1:
                    loses[col] = True
                else:
                    loses[row] = True
        return loses.index(False)