Add C++ solution of problem #3151

Author: Cuda-Chen

3151/solution.cpp

@@ -0,0 +1,12 @@
+class Solution {
+public:
+    bool isArraySpecial(vector<int>& A) {
+        int n = A.size();
+        for(int i = 1; i < n; i++) {
+            int j = i - 1;
+            if(((A[i] ^ A[j]) % 2) == 0)
+                return false;
+        }
+        return true;
+    }
+};