def find_max(matrix): max_val = float('-inf') # 初始值设为负无穷 for row in matrix: for num in row: if num > max_val: max_val = num return max_val # 示例用法 matrix = [] for i in range(3): nums = list(map(int, input().split())) matrix.append(nums) result = find_max(matrix) print(result)