Day 34.2.txt

389. Find the Difference

You are given two strings s and t.

String t is generated by random shuffling string s and then add one more letter at a random position.

Return the letter that was added to t.

 

Example 1:

Input: s = "abcd", t = "abcde"
Output: "e"
Explanation: 'e' is the letter that was added.
Example 2:

Input: s = "", t = "y"
Output: "y"
Example 3:

Input: s = "a", t = "aa"
Output: "a"
Example 4:

Input: s = "ae", t = "aea"
Output: "a"
 

Constraints:

0 <= s.length <= 1000
t.length == s.length + 1
s and t consist of lower-case English letters.


class Solution {
    public char findTheDifference(String s, String t) {
        if(s.length()==0)
            return t.charAt(0);
        int i;
        char c[]=s.toCharArray();
        char d[]=t.toCharArray();
        Arrays.sort(c);
        Arrays.sort(d);
        for(i=0;i<c.length;i++)
        {
            if(c[i]!=d[i])
                return d[i];
        }
        return d[i];
    }
}