refactoring ReverseString.java

Author: shrinathjoshi

June Challenge/com/leetcode/JuneChallenge/week1/ReverseString.java

@@ -9,9 +9,9 @@ public void reverseString(char[] s) {
 		int right = s.length - 1;
 
 		while (left < right) {
-			char temp = s[left];
-			s[left] = s[right];
-			s[right] = temp;
+			s[left] = (char) (s[left] ^ s[right]);
+			s[right] = (char) (s[right] ^ s[left]);
+			s[left] = (char) (s[left] ^ s[right]);
 			left++;
 			right--;
 		}