题解·

#include <iostream>
using namespace std;

int main()
{
string s,a;
int n,t;
cin>>s>>n;
for
(int i=0;i<n;i++)
{
cin>>t;
if(t1)
{
cin>>a;
s+=a;
}
else if(t2)
{
cout<<s.size()<<endl;
}
else if(t==3)
{
cin>>a;
if(a>s)
{
cout<<a;
}
else
{
cout<<s;
}
}
}
return 0;
}