ultra_fast_mathematician.java

import java.util.Scanner;
public class ultra_fast_mathematician {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        String sc1=sc.nextLine();
        String sc2=sc.nextLine();
        String [] arr1=new String[sc1.length()];
        
        if(sc1.length()==sc2.length())
        {
            for(int i=0;i<sc1.length();i++)
            {
                if(sc1.charAt(i)==sc2.charAt(i))
                {
                    arr1[i]="0";
                }
            else
                    {
                    arr1[i]="1";
                    }
                }
            }
            for(int j=0;j<sc1.length();j++)
            System.out.print(arr1[j]);
            sc.close();
        }
    }