#include <bits/stdc++.h>
using namespace std;
string lg[100]={"", },pas[100]={"", };
void lgpas() 
{ 
    lg[0]="admin"; pas[0]="0000"; 
}
int enter()
{ 
    cout<<"\nLogin or register?(0/1):\t"; 
    int n; cin>>n; return n; 
} 
void reg() 
{ 
    string l,p; 
    cout<<"Registration:\n"; 
    cout<<"Login:\t"; 
    cin>>l; 
    cout<<"Password:\t"; 
    cin>>p; int i=0; 
    while(lg[i]!="") 
    { 
        i++;
    } 
    lg[i]=l; 
    pas[i]=p; 
} 
int login() 
{ 
    for(int i=0;i<3;i++) 
    { 
        system("cls"); 
        string l,p; 
        cout<<"Login:\t"; 
        cin>>l; 
        cout<<"Password:\t"; 
        cin>>p; 
        for(int i=0;i<100;i++) 
        { 
            if(l==lg[i]&&p==pas[i]) 
            { 
                cout<<"Sucsesful!!!"<<endl;
                return 0; 
            } 
        } 
        cout<<"Error,try again"<<endl; 
    } return 1; 
} 
int main() 
{ 
    lgpas(); 
    cout<<"Hello"<<endl; 
    if(enter()==1) 
    { 
        reg();
    } 
    system("pause"); 
    if(login()==1) 
    { 
        cout<<"EROR,SHUTDOWN!!!"<<endl; 
        system("pause"); 
        return 0;
    } 
        cout<<"Welcome";
        return 0;
}