Update customers-who-bought-products-a-and-b-but-not-c.sql

Author: kamyu104

MySQL/customers-who-bought-products-a-and-b-but-not-c.sql

@@ -1,5 +1,5 @@
-# Time:  O(n)
-# Space: O(m)
+# Time:  O(m + n)
+# Space: O(m + n)
 
 SELECT c.customer_id, 
        c.customer_name