Python刷题日记--矩阵乘法

问题描述
　　给定一个N阶矩阵A，输出A的M次幂（M是非负整数）
　　例如：
　　A =
　　1 2
　　3 4
　　A的2次幂
　　7 10
　　15 22
输入格式
　　第一行是一个正整数N、M（1<=N<=30, 0<=M<=5），表示矩阵A的阶数和要求的幂数
　　接下来N行，每行N个绝对值不超过10的非负整数，描述矩阵A的值
输出格式
　　输出共N行，每行N个整数，表示A的M次幂所对应的矩阵。相邻的数之间用一个空格隔开
样例输入
2 2
1 2
3 4
样例输出
7 10
15 22

def get_changeList(numList, size):
    list1 = [[0 for _ in range(size)] for _ in range(size)]
    for i in range(size):
        for j in range(size):
            list1[i][j] = numList[j][i]
    return list1


def get_newList(numList, list1, size):
    newList = [[0 for _ in range(size)] for _ in range(size)]
    for i in range(size):
        for j in range(size):
            newList[i][j] = sum([numList[i][k] * list1[j][k] for k in range(size)])
    return newList


if __name__ == '__main__':

    alls = input().split(" ")
    size = int(alls[0])
    times = int(alls[1])
    numList = [[int(i) for i in input().split(" ")] for _ in range(size)]
    list1 = [[0 for _ in range(size)] for _ in range(size)]

    for _ in range(times - 1):
        list1 = get_changeList(numList, size)
        numList = get_newList(numList, list1, size)
    print(numList)

标签：__,Python,newList,list1,--,range,刷题,numList,size
来源： https://blog.csdn.net/quzah/article/details/121072172