Why is it giving error? Output is same regardless of the order…
import java.util.*;
public class Main {
public static void main(String args[]) {
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
while(n-- >0)
{
String str=sc.next();
subsequence(str," ");
}
}
public static void subsequence(String str, String res)
{
if(str.length()==0)
{
System.out.println(res);
return;
}
char cc= str.charAt(0);
String ros= str.substring(1);
subsequence(ros,res);
subsequence(ros,res+cc);
}
}