sua loi giup minh bt nay voiiii'

import java.io.*;
public class SoNhiPhan2
{
String NhiPhan(int n)
{
String kq="";
while(n!=0)
{
int t=n%2;
n/=2;
kq=t+kq;
}
return kq;
}
public static void main(String[] args)
throws IOException
{
BufferedReader in= new BufferedReader(new InputStreamReader(System.in));
System.out.print("nhap vao so nguyen: ");
int n=Integer.parseInt(in.readLine());
String y= new NhiPhan(n);
System.out.print("day so nhi phan la: "+y );
}
};

import java.io.*;
class SoNhiPhan
{
public static void main(String[] args)
throws IOException
{
BufferedReader in= new BufferedReader(new InputStreamReader(System.in));
System.out.print("nhap vao so nguyen: ");
int n=Integer.parseInt(in.readLine());

import java.util.Scanner;
public class baitap{
public static void main(String[] chuoi){
Scanner input = new Scanner(System.in);
String HoTen, Tuoi, Lop;
System.out.print("Ho va ten: ");HoTen = input.nextLine();

import java.io.*;
public class Binary
{
public static void main(String[] args)
throws IOException
{
BufferedReader in= new BufferedReader(new InputStreamReader(System.in));
System.out.print("nhap vao so nguyen: ");
int n=Integer.parseInt(in.readLine());
NhiPhan y= new NhiPhan(n);
}
}

class NhiPhan {

    public NhiPhan(int n) {
        String kq="";
        while(n!=0)
            {
                int t=n%2;
                n/=2;
                kq=t+kq;
            }
        System.out.println("Ket qua: "+kq);
    }
}