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FindSubsequences.java

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package practice;

public class Subsequences {

public static String[] findSub(String s)

{

if(s.length()==0)

{

String ans[] = {""};

return ans;

}

String smallAns[] = findSub(s.substring(1));

String ans[] = new String[2 * smallAns.length];

for(int i =0;i<smallAns.length;i++)

{

ans[i]=smallAns[i];

}

for(int i = 0;i<smallAns.length;i++)

{

ans[i+smallAns.length]=s.charAt(0)+smallAns[i];

}

return ans;

}

public static void main(String[] args) {

String ans[] = findSub("xyz");

for(String s:ans)

{

System.out.println(s);

}

}

}