```cpp
#include<bits/stdc++.h>
using namespace std;
string s1,s2;
void post(string pre,string mid)
{
if(pre.size() <= 0)
return ;
char root=pre[0];
int rootid=mid.find(root);
pre.erase(pre.begin());
post(pre.substr(0,rootid),mid.substr(0,rootid));
post(pre.substr(rootid),mid.substr(rootid+1));
cout<<root;
}
int main()
{
cin>>s1>>s2;
post(s2,s1);
return 0;
}
```
ACed
前中后序混了，还有没有删除
by Null_h @ 2023-12-30 14:21:48
谢谢大佬，AC了，已关
by wch666 @ 2024-01-02 20:50:09