N = int(input("请输入矩阵的大小N（N<10）：")) max_value = None min_value = None for i in range(N): row = list(map(int, input().split())) if max_value is None or min_value is None: max_value, min_value = row[0], row[0] for num in row: if num > max_value: max_value = num elif num < min_value: min_value = num print(f"{min_value} {max_value}")