确实挺难的，这是python的题解，仅供参考，请勿照抄！

a=[int(i)for i in input().split()]
b,c=[],[]
for i in range(a[0]):
    b.append([int(i)for i in input().split()])
for i in range(a[0]):
    c.append([int(i)for i in input().split()])
ans=0
for i in range(len(b)):
    for j in range(len(b[i])):
        if b[i][j]==c[i][j]:
            ans+=1
answer=0
for i in range(len(b)):
    for j in range(len(b[i])):
        answer+=1
answer=ans/answer*100
answer="%.2f"%answer
print(answer)