已AC，放心食用

#include<bits/stdc++.h>
using namespace std;
queue<string>dk;//因为是排队所以采用队列较好 
int main(){
	string a,b;
	while(cin>>a){//根据题意模拟 
		if(a=="PUSH"){
			cin>>b;
			dk.push(b);
		}
		if(a=="POP"){
			if(!dk.empty()){
				cout<<dk.front()<<endl;
				dk.pop();
			}
			else cout<<"EMPTY"<<endl;
		}
		if(a=="END") return 0;
    }
	return 0;
}

AC Answer Confused 代码

#include <iostream>
#include <queue>
using namespace std;
string op,name;
queue<string> que;
int main(){
    while(true){
        cin>>op;
        if(op=="END")break;
        else if(op=="PUSH"){cin>>name;que.push(name);}
        else{
            if(que.empty())cout<<"EMPTY"<<endl;
            else {cout<<que.front()<<endl;que.pop();}
        }
    }
    return 0;
}

虽然我知道用队列，但是我RTE了，哪位大神改一下

#include <iostream>
#include <queue>
using namespace std;
queue<string> name;
int cnt=0;
string ins="Notend",s;
int main(){
    while(ins!="END"){
        cin>>ins;
        if(ins=="PUSH"){
            cin>>s;
            name.push(s);
        }else if(ins=="POP"){
            cout<<name.front()<<endl;
            name.pop();
        }
    }
    return 0;
}