题解 | 图像相似度

n, m = map(int, input().split())
zong = n * m
l1 = []
l2 = []
tong = 0
for i in range(n):
    l = list(map(int, input().split()))
    l1 = l1 + l
for i in range(n):
    l = list(map(int, input().split()))
    l2 = l2 + l
for i in range(zong):
    if l1[i] == l2[i]:
        tong = tong + 1
du = tong * 100 / zong
print(f'{du:.2f}')