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// Print all the subsequences of a string.

// time complexity = O(2^n) , n= no. of character in string

package Recursion;

public class PrintSubsequences {

public static void subsequences(String str, int idx, String newStr){

if(idx == str.length()){

System.out.println(newStr);

return;

}

char currChar = str.charAt(idx);

// to be come the character in new string(newstr)

subsequences(str, idx+1, newStr+currChar);

// not to be come the character in the new string(newStr)

subsequences(str, idx+1, newStr);

}

public static void main(String[] args) {

String str = "abc";

subsequences(str, 0, "");

}