STAMPS - Stamps

Everybody hates Raymond. He’s the largest stamp collector on planet earth and because of that he always makes fun of all the others at the stamp collector parties. Fortunately everybody loves Lucy, and she has a plan. She secretly asks her friends whether they could lend her some stamps, so that she can embarrass Raymond by showing an even larger collection than his. Raymond is so sure about his superiority that he always tells how many stamps he’ll show.And since Lucy knows how many she owns, she knows how many more she needs. She also knows how many friends would lend her some stamps and how many each would lend. But she’s like to borrow from as few friends as possible and if she needs too many then she’d rather not do it at all. Can you tell her the minimum number of friends she needs to borrow from?


The first line contains the number of scenarios. Each scenario describes one collectors party and its first line tells you how many stamps (from 1 to 1000000) Lucy needs to borrow and how many friends (from 1 to 1000) offer her some stamps. In a second line you’ll get the number of stamps (from 1 to 10000) each of her friends id offering.


The output for every scenario begins with a line containing “Scenario #i:”, where i is the number of the scenario starting at 1. Then print a single line with the minimum number of friends Lucy needs to borrow stamps from. If it’s impossible even if she borrows everything from everybody, write impossible. Terminate the output for the scenario with a blank line.


100 6
13 17 42 9 23 57
99 6
13 17 42 9 23 57
1000 3
314 159 265

Scenario #1:

Scenario #2:

Scenario #3:

hide comments
amous_19291: 2015-08-26 07:43:16

easy.........AC in one go>>>:p

suhas: 2015-08-19 19:15:19

stupid stupid problem. do not even try it. costed me 3WA because of bad input format.

Deepak Singh: 2015-08-13 21:22:42

Such a bad output formating. Costed me 4WAs. Simple Problem btw.

Akshay Aradhya: 2015-07-16 19:10:25

I printed "impossible" with a capital I -_- Got WA *facepalm*

Satvik Maurya: 2015-06-27 11:29:07

Got WA coz of a stupid ":" -_-

daya: 2015-06-24 07:46:22

AC in one go .. sort the no of stumps..

Sulabh Kumar: 2015-06-11 14:37:31

got 4 WA because i forgot to clear priority queue.

Sandip Jana: 2015-06-10 00:28:32

AC in one Go.. Feeling Confident.. Thanks to the problem Setter.. :)

rudra21: 2015-06-09 18:58:58

Go greedy !! :D

Harsh Vardhan Ladha: 2015-05-26 18:06:34


Added by:Daniel Gómez Didier
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ERL JS-RHINO
Resource:2007 - Circuito de Maratones ACIS / REDIS