string配万能头够用

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s,s1,s2;
	cin>>s;
	int y,x;
	cin>>y;
	for(int i=0;i<y;i++){
		cin>>x;
		if(x==1){
			cin>>s1;
			s+=s1;}
		if(x==2){
			cout<<s.length()<<endl;}
		if(x==3){
			cin>>s2;
			if(s2>s){
				cout<<s2<<endl;
			}else{
				cout<<s<<endl;}}}
	return 0;
}