题解 | 扫雷

n,m=map(int,input().split())
A=[]
for i in range(n):
    a=list(input())
    A.append(a)
B = [['*' for _ in range(m)] for _ in range(n)]

for i in range(n):
    for j in range(m):
        if A[i][j]=='.':
            c=0
            for k in range(i-1,i+2):
                for l in range(j-1,j+2):
                    if 0<=k<n and 0<=l<m and A[k][l]=='*':
                        c+=1
            B[i][j]=str(c)
for row in B:            
    print(''.join(row))