应该放在模拟里面会更好

解题思路:

n=int(input())

a=[[0 for x in range(n+1)] for y in range(n+1)]

for x in range(1,n+1):

    a[x][1:]=list(input())

m=int(input())

b=[[0 for x in range(n+2)] for y in range(n+2)]

for i in range(1,m):

    b=[[0 for x in range(n+2)] for y in range(n+2)]

    for j in range(1,n+1):

        for k in range(1,n+1):

            if a[j][k]=="@":

                b[j][k-1]=1

                b[j][k+1]=1

                b[j-1][k]=1

                b[j+1][k]=1

    for j in range(1,n+1):

        for k in range(1,n+1):

            if a[j][k]=="." and b[j][k]==1:

                a[j][k]="@"

res=0

for j in range(1,n+1):

    for k in range(1,n+1):

        if a[j][k]=="@":

            res+=1

print(res)

参考代码: