public class FindTheDifference {

public char findTheDifference(String s, String t) {

import java.util.ArrayList;

import java.util.List;

| # | Title | Solutions | Time | Space | Difficulty | Tag | Notes

|-----|----------------|---------------|---------------|---------------|-------------|--------------|-----

|415|[Add Strings](https://leetcode.com/problems/add-strings/)|[Solution](../../blob/master/EASY/src/easy/AddStrings.java)| O(n)|O(1) | Easy|

|388|[Longest Absolute File Path](https://leetcode.com/problems/longest-absolute-file-path/)|[Solution](../../blob/master/MEDIUM/src/medium/LongestAbsoluteFilePath.java)| O(n)|O(d) | Medium| Stack

|387|[First Unique Character in a String](https://leetcode.com/problems/first-unique-character-in-a-string/)|[Solution](../../blob/master/EASY/src/easy/FirstUniqueCharacterinaString.java)| O(n)|O(n) | Easy| HashMap

|386|[Lexicographical Numbers](https://leetcode.com/problems/lexicographical-numbers/)|[Solution](../../blob/master/MEDIUM/src/medium/LexicographicalNumbers.java)| O(n)|O(1) | Medium|