题解 | #图像相似度#

m,n = map(int, input().split())
c = []
d = []
count = 0
for i in range(m):
    c.append(list(map(int, input().split())))
for j in range(m):
    d.append(list(map(int, input().split())))
for i in range(m):
    for j in range(n):
        if int(c[i][j]) == int(d[i][j]):
            count += 1 
print('%.2f' % (count/(m*n)*100))