create 0941 folder & cpp version

Author: zouwx2cs

solution/0941.Valid Mountain Array/Solution.cpp

@@ -0,0 +1,20 @@
+class Solution {
+public:
+    bool validMountainArray(vector<int>& A) {
+        if (A.size() < 3)
+            return false ;
+        
+        A.push_back(A[0]) ;
+        int lastIndex = A.size()-2 ;
+        int p ;
+        for (p = 0; A[p] < A[p+1]; ++p)
+            ;
+        if (p == lastIndex || 0 == p)
+            return false ;
+        A[A.size()-1] = A[p] ;
+        for (; A[p] > A[p+1]; ++p)
+            ;
+        
+        return p == lastIndex ;   
+    }
+};