a = input()
b = input()
la = len(a)
lb = len(b)
#建立二维列表，行数la+1，列数lb+1,初值为0
res =
lc = []
mmax = 0
for i in range(1, la+1):
for j in range(1, lb+1):
if a[i-1] == b[j-1]:
res[i][j] = res[i-1][j-1] + 1
if():
mmax = res[i][j]
print(mmax)
可以帮我补一下res后面和if后面的内容吗，因为一直打出来是错的
a = input()
b = input()
la = len(a)
lb = len(b)
#建立二维列表，行数la+1，列数lb+1,初值为0
res = [[0 for i in range(lb+1)] for j in range(la+1)]
lc = []
mmax = 0
for i in range(1, la+1):
for j in range(1, lb+1):
if a[i-1] == b[j-1]:
res[i][j] = res[i-1][j-1] + 1
if(res[i][j] > mmax):
mmax = res[i][j]
print(mmax)
这个是补全代码的题目吗？res = [[0 for i in range(lb+1)] for j in range(la+1)]