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50993 - Products in store

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Лимит времени 2000/4000/4000/4000 мс. Лимит памяти 65000/65000/65000/65000 Кб.
Question by Ibrahim Mesecan.

Products in store

Question: In order to follow the products in store, a whole sale company needs a program. You're first given the ids and amounts of m products from the report for last year. Then, you are given information for m instructions. Find the top k items which have the most number (amount) in the store. Note: Pay attention that the second list may contain new products which was not in the list before.

Input specification: You will be given three integers in the beginning:

  • The number of items existing in the store (n): an integer not greater than 10,000,
  • The number of instructions (m): an integer not greater than 10,000,
  • The number of top products to list (k).
Then, the following n lines contain two information: the product ID and existing amount in the store. Product ID is at most 10 char long alpha-numeric sequence and the amount is a floating point number not greater than 1e6. Then in the following m lines, you will be given m instructions. Each instruction contains three information: a char (E or S), a product ID, and a number where
  • 'E ID N' means N items (of product ID) have entered to the store.
  • 'S ID N' means N items (of product ID) have been sold from the store.

Output specification: Show top k products existing in the store (in descending order). If there are two items with the same amount, show in ascending order according to product IDs.

Sample Input
4 5 2
OMVA61 32
ICKX42 50
WPPZ49 34
EUGO62 52
E OMVA61 51
S EUGO62 13
S ICKX42 34
S OMVA61 56
E GCGW69 56.4
 		Sample Output
GCGW69
EUGO62

Explanation: There are 4 products in the store. Then, we are given 5 instructions. Here is the list of items and their total amounts after processing m instructions.

Product Code Amount in the store
EUGO62 39
GCGW69 56.4
ICKX42 16
OMVA61 27
WPPZ49 34
Thus, the top two items are GCGW69 and EUGO62.



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