Implement skip list

Author: AliQassab

Sprint-2/implement_skip_list/skip_list.py

@@ -0,0 +1,37 @@
+class SkipList:
+    def __init__(self):
+        self.data = []
+    
+    def insert(self, value):
+        """Insert value in sorted order"""
+        # Find insertion point
+        left, right = 0, len(self.data)
+        while left < right:
+            mid = (left + right) // 2
+            if self.data[mid] < value:
+                left = mid + 1
+            else:
+                right = mid
+        
+        # Insert at found position
+        self.data.insert(left, value)
+    
+    def contains(self, value) -> bool:
+        """Check if value exists"""
+        left, right = 0, len(self.data)
+        while left < right:
+            mid = (left + right) // 2
+            if self.data[mid] == value:
+                return True
+            elif self.data[mid] < value:
+                left = mid + 1
+            else:
+                right = mid
+        return False
+    
+    def to_list(self) -> list:
+        """Convert to sorted list"""
+        return self.data.copy()
+    
+    def __contains__(self, value) -> bool:
+        return self.contains(value)