我總會把問題想的很複雜到最後做不出來，嘖嘖嘖，咋辦呢
```c++
class Solution {
public:
bool isSubsequence(string s, string t) {
if(s.empty())
return true;
int scount=0;
for(int i=0;i<(int)t.length();++i)
{
if(t[i]==s[scount])
{
++scount;
if(scount == (int)s.length())
return true;
}
}
return false;
}
};
```