package switchprograms;

import java.util.*;

public class dec

{

public static void main()

{

Scanner ob=new Scanner(System.in);

System.out.println("enter number");

int n=ob.nextInt();

int a,i=0;String b[]={"A","B","C","D","E","F"};

int x=n;String s1="",s2="";

while(n!=0)

{

a=n%16;

String a1=String.valueOf(a);

if(a==10)

{

s1=b[0];

}

else if(a==11)

{

s1=b[1];

}

else if(a==12)

{

s1=b[2];

}

else if(a==13)

{

s1=b[3];

}

else if(a==14)

{

s1=b[4];

}

else if(a==15)

{

s1=b[5];

}

else

{

s1=a1;}

int t=(int)Math.pow(10,i);int q=a*t;

i++;

s2=s1+q+s2;

n=n/16;

}

System.out.println(s2);

}

}