Find The Difference

Find The Difference hash table

Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one more letter at a random position. Find the letter that was added in t.


s = "abcd"
t = "abcde"


'e' is the letter that was added.

Find The Difference Solution

public class FindTheDifference {
    public char findTheDifference(String s, String t) {
        int charCodeS = 0;
        int charCodeT = 0;

        for(int i = 0; i < s.length(); i++) {
            charCodeS += (int)(s.charAt(i));

        for(int i = 0; i < t.length(); i++) {
            charCodeT += (int)(t.charAt(i));

        return (char)(charCodeT - charCodeS);
Last modified October 4, 2020