Find the Difference | Leetcode 389 solution

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 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"

 

Constraints:

  • 0 <= s.length <= 1000
  • t.length == s.length + 1
  • s and t consist of lowercase English letters.

solution : 


class Solution {
public:
    char findTheDifference(string s, string t) {
        
          int result = 0;
          for(int i =0; i < s.length() ; i++)
          {
              int x = s[i];
              int y = t[i];
              result = result ^ x ^ y;

          }
          result = result ^ ((int)t[t.length()-1]);
          return (char)result;

      
    }
};


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