2869: 字符串最大跨距

解题思路:

注意事项:

参考代码:

l = list(input().strip().split(","))

a = l[0].find(l[1])

b = l[0].rfind(l[2])

if a != -1 and b != -1 and (b-a) >= len(l[1]):

    print(b-a-len(l[1]))

else:

    print(-1)