Add 896-MonotonicArray.cpp

Author: Rocky-Dewan

Leet_Code/Random Problem/896-MonotonicArray.cpp

@@ -0,0 +1,12 @@
+class Solution {
+public:
+    bool isMonotonic(vector<int>& nums) {
+        bool up(true), down(true);
+        for(int p = 1; p < nums.size(); p++){
+            if(nums[p - 1] < nums[p]){up = false;}
+            if(nums[p - 1] > nums[p]){down = false;}
+        }
+
+        return up || down;
+    }
+};