rowMax = list(map(max, grid))#行最大值
colMax = list(map(max, zip(*grid)))#列最大值
rowMax = list(map(min, grid))#行最小值
colMax = list(map(min, zip(*grid)))#列最小值

rowMax = list(map(max, grid))#行最大值
colMax = list(map(max, zip(*grid)))#列最大值
rowMax = list(map(min, grid))#行最小值
colMax = list(map(min, zip(*grid)))#列最小值