题解 | 牛牛的矩阵相加
牛牛的矩阵相加
https://www.nowcoder.com/practice/730b90507602412fac90a3f106bfa0cd
num = int(input())
matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
for i in range(len(matrix)):
a = []
for j in matrix[i]:
a.append(j * num)
matrix[i] = a
print(matrix)
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