Simple Inventory Management System

This problem requires you to simulate a simple inventory management system. The system supports three operations:

• add: Add an item with a given quantity and price. If the item already exists, increase its quantity while retaining the price.
• delete: Remove an item from the inventory if it exists.
• search: This operation does not modify the inventory.

You will be given a sequence of operations provided via stdin. The first line contains an integer n denoting the number of operations. Each of the next n lines contains an operation string. An operation string is formatted as follows:

• For add: add,item,quantity,price
• For delete: delete,item
• For search: search,item

Your task is to process these operations and then output the final inventory. The final inventory should be printed as a JSON object on stdout where keys are item names and values are an array of two elements: the total quantity and the price. The keys in the output JSON object must be in lexicographical order.

Note: The search operation does not alter the state of the inventory.

inputFormat

The first line of input contains an integer n representing the number of operations. Each of the following n lines contains a comma-separated operation command as described above.

Example:

5
add,apple,10,0.5
add,banana,5,0.3
search,banana
delete,apple
add,banana,2,0.3

outputFormat

Output the final state of the inventory as a JSON object. For each item, the key is the item's name and the value is an array containing two elements: the accumulated quantity (an integer) and the price (a float). The keys should be output in lexicographical order. If the inventory is empty, output an empty JSON object {}.

Example Output for the sample input above:

{"banana": [7, 0.3]}

## sample

1
add,apple,10,0.5

{"apple": [10, 0.5]}