自己的解法
class Solution:
def isSubsequence(self, s: str, t: str) -> bool:
mark = False
if len(s) == 0:
return True
for i in range(len(t)):
if len(s) != 0:
if t[i] == s[0]:
s = s[1:]
if len(s) == 0:
mark = True
return mark