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.
Example:
Input: s = "abcd" t = "abcde" Output: e Explanation: 'e' is the letter that was added.
My Solution:
public class Solution { public char findTheDifference(String s, String t) { int scount = 0,tcount = 0; for(int i = 0 ; i < s.length() ; i++){ scount += (int)s.charAt(i); } for(int j = 0 ; j < t.length() ; j++){ tcount += (int)t.charAt(j); } return (char)(tcount-scount); } }
Others' Solution:
public char findTheDifference(String s, String t) { char c = 0; for (int i = 0; i < s.length(); ++i) { c ^= s.charAt(i); } for (int i = 0; i < t.length(); ++i) { c ^= t.charAt(i); } return c; }