diff --git a/1206. Design Skiplist (Hard) b/1206. Design Skiplist (Hard)
new file mode 100644
index 0000000..61ad7dd
--- /dev/null
+++ b/1206. Design Skiplist (Hard)	
@@ -0,0 +1,39 @@
+class Skiplist {
+public:
+
+    map<int,int>s;
+    
+    Skiplist() {
+        
+    }
+    
+    bool search(int target) {
+        if(s.find(target)!=s.end())
+            return true;
+        else 
+            return false;
+    }
+    
+    void add(int num) {
+        s[num]++;
+    }
+    
+    bool erase(int num) {
+        if(s.find(num)==s.end())
+            return false;
+        else{
+            s[num]--;
+            if(s[num]==0)
+                s.erase(num);
+            return true;
+        }
+    }
+};
+
+/**
+ * Your Skiplist object will be instantiated and called as such:
+ * Skiplist* obj = new Skiplist();
+ * bool param_1 = obj->search(target);
+ * obj->add(num);
+ * bool param_3 = obj->erase(num);
+ */