Inventory and Lookups LeetCode-Style | Dataford Interview Questions

Tell me about how you would approach a LeetCode-style question about managing inventory and lookups, including the three-phase approach.

Implement the function below using three phases: build the inventory map, process operations in order, and return lookup results. A restock adds units, a sell removes units only when sufficient stock exists, and a lookup records the current quantity or -1 for an unknown SKU.

Input: unique [sku, quantity] pairs and operation dictionaries. Output: quantities for lookup operations in order.

Constraints

0 <= initial_inventory.length <= 10^4
0 <= operations.length <= 10^5
SKUs are non-empty strings
Initial SKUs are unique
Initial quantities and operation quantities are non-negative integers
Each operation type is exactly one of restock, sell, or lookup

Function Signature

def process_inventory(initial_inventory, operations):

Your question is Inventory and Lookups LeetCode-Style. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Tell me about how you would approach a LeetCode-style question about managing inventory and lookups, including the three-phase approach.

Input: unique [sku, quantity] pairs and operation dictionaries. Output: quantities for lookup operations in order.

Constraints

0 <= initial_inventory.length <= 10^4
0 <= operations.length <= 10^5
SKUs are non-empty strings
Initial SKUs are unique
Initial quantities and operation quantities are non-negative integers
Each operation type is exactly one of restock, sell, or lookup

Function Signature

def process_inventory(initial_inventory, operations):

Your question is Inventory and Lookups LeetCode-Style. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.