Create find-the-difference.cpp

Author: kamyu104

C++/find-the-difference.cpp

@@ -0,0 +1,10 @@
+// Time:  O(n)
+// Space: O(1)
+
+class Solution {
+public:
+    char findTheDifference(string s, string t) {
+        return accumulate(s.cbegin(), s.cend(), 0, std::bit_xor<int>()) ^
+               accumulate(t.cbegin(), t.cend(), 0, std::bit_xor<int>());
+    }
+};