YC题解

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string str,str1,str2;
	int n,a;
	cin>>str>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>a;
		if(a == 1)
		{
			cin>>str1;
			str += str1;
		}
		else if(a == 2) cout<<str.size()<<endl;
		else if(a == 3)
		{
			cin>>str2;
			if(str > str2) cout<<str<<endl;
			else cout<<str2<<endl; 
		}
	} 	
	return 0;
}