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package algorithms.easy;

import java.util.Stack;

public class BackspaceStringCompare {

public boolean backspaceCompare(String s, String t) {

return removeLetter2(s).equals(removeLetter2(t));

}

private static String removeLetter2(String input) {

StringBuilder str = new StringBuilder();

char[] charArray = input.toCharArray();

for (char c : charArray) {

if (c != '#') {

str.append(c);

} else if (!str.isEmpty()) {

str.deleteCharAt(str.length() - 1);

}

}

return str.toString();

}

private static String removeLetter1(String input) {

Stack<Character> stack = new Stack<>();

char[] charArray = input.toCharArray();

for (char c : charArray) {

if (c != '#') {

stack.push(c);

} else if (!stack.isEmpty()) {

stack.pop();

}

}

return stack.toString();

}

}