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| import java.util.*;
class Program {
public static boolean interweavingStrings(String one, String two, String three) {
StringBuilder currentString = new StringBuilder();
return helper(currentString, one, two, three, 0, 0);
}
public static boolean helper(StringBuilder current, String one, String two, String three,
int posOne, int posTwo) {
if (posOne == one.length()) {
String result = current.toString() + two.substring(posTwo, two.length());
return result.equals(three);
}
if (posTwo == two.length()) {
String result = current.toString() + one.substring(posOne, one.length());
return result.equals(three);
}
current.append(one.charAt(posOne));
boolean selectStringOne = helper(current, one, two, three, posOne + 1, posTwo);
current.deleteCharAt(current.length() - 1);
if (selectStringOne)
return true;
current.append(two.charAt(posTwo));
boolean selectStringTwo = helper(current, one, two, three, posOne, posTwo + 1);
current.deleteCharAt(current.length() - 1);
return selectStringTwo;
}
}
|
