import java.util.Scanner;
public class Deci2Bin
{
    public static void main(String[] args) 
    {
        int n;
        String x;
        Scanner s = new Scanner(System.in);
        System.out.print("Enter any decimal number:");
        n = s.nextInt();
       Deci2Bin obj = new Deci2Bin();
        x = obj.inBinary(n);
        System.out.println("Binary number:"+x);
    }
    String inBinary(int y)
    {
        int a;
        if(y > 0)
        {
            a = y % 2;
            return (binary(y / 2) + "" +a);
        }
        return "";
    }
}

import java.util.Scanner;
public class BinToDeci {
 
    public int getDecimalFromBinary(int binary){
         
        int decimal = 0;
        int power = 0;
        while(true){
            if(binary == 0){
                break;
            } else {
                int tmp = binary%10;
                decimal += tmp*Math.pow(2, power);
                binary = binary/10;
                power++;
            }
        }
        return decimal;
    }
     
    public static void main(String a[]){
Scanner sc=new Scanner(System.in);       
System.out.print("Enter binary number(0and 1)");
int bin=sc.nextInt(); 
BinToDeci bd = new BinToDeci();
        System.out.print("Decimal Number:"+getDecimalFromBinary(bin);
    }
}