Create 22 April Unique Number I (#774)

Author: Chayandas07

22 April Unique Number I

@@ -0,0 +1,6 @@
+class Solution {
+  public:
+    int findUnique(vector<int> &arr) {
+        return accumulate(begin(arr),end(arr),0,bit_xor<>());
+    }
+};