#include<bits/stdc++.h>
using namespace std;
int main(){
int a,l=10,o=114514,oo,u=0,ii;
char kk=0;
cout<<"欢迎来到MK银行，请输入密码"<<endl;
while(l>=0){
cin>>a;
if(a==9100){
cout<<"请取钱"<<endl;
cout<<"取多少钱？"<<endl;
cin>>oo;
if(oo<=o){
cout<<"成功取出"<<oo<<"元"<<endl;
u+=oo;
o-=oo;
}else{
cout<<"余额不足，请充值(y/n)"<<endl;
cin>>kk;
if(kk=='y'){
cout<<"充多少钱？"<<endl;
cout<<ii;
o+=ii;
}else if(kk=='n'){
cout<<"好的，再见"<<endl;
break;
}
}
}else if(a!=123456){
cout<<"输入错误，重新输入"<<endl;

}if(u!=0){
cout<<"余额为"<<u<<"元"<<endl;
}
if(o!=0){
cout<<"还剩下"<<o<<"元"<<endl;
}
}

return 0;
}