PARTY - Party Schedule

You just received another bill which you cannot pay because you lack the money.
Unfortunately, this is not the first time to happen, and now you decide to investigate the cause of your constant monetary shortness. The reason is quite obvious: the lion's share of your money routinely disappears at the entrance of party localities.

You make up your mind to solve the problem where it arises, namely at the parties themselves. You introduce a limit for your party budget and try to have the most possible fun with regard to this limit.

You inquire beforehand about the entrance fee to each party and estimate how much fun you might have there. The list is readily compiled, but how do you actually pick the parties that give you the most fun and do not exceed your budget?

Write a program which finds this optimal set of parties that offer the most fun. Keep in mind that your budget need not necessarily be reached exactly. Achieve the highest possible fun level, and do not spend more money than is absolutely necessary.


The first line of the input specifies your party budget and the number n of parties.

The following n lines contain two numbers each. The first number indicates the entrance fee of each party. Parties cost between 5 and 25 francs. The second number indicates the amount of fun of each party, given as an integer number ranging from 0 to 10.

The budget will not exceed 500 and there will be at most 100 parties. All numbers are separated by a single space.

There are many test cases. Input ends with 0 0.


For each test case your program must output the sum of the entrance fees and the sum of all fun values of an optimal solution. Both numbers must be separated by a single space.


Sample input:
50 10
12 3
15 8
16 9
16 6
10 2
21 9
18 4
12 4
17 8
18 9 

50 10
13 8
19 10
16 8
12 9
10 2
12 8
13 5
15 5
11 7
16 2

0 0

Sample output:
49 26
48 32

hide comments
Mayank Srivastava: 2016-09-24 07:52:26

My 100th problem...:)
0/1 knapsack

Last edit: 2016-09-25 09:54:54
code_crusher: 2016-08-23 15:42:37

Nice Problem :)

starun8795: 2016-08-21 16:08:12

0-1 knapsack.. nice.

madhavgaba: 2016-08-05 11:16:09

AC in a go:)

rishabh_1997: 2016-07-12 12:31:28

Learnt various new things..
Recommended problem for beginner DP.
It feels nice when your 100th AC comes in just one attempt. :)

ayushjainsir: 2016-06-28 16:58:11

Its take a lot time to understand Knapsack problem
but at last AC in one go...

hpabhi: 2016-06-25 09:14:05

AC with a bottom up dp. but not able to memoize in top down needed

baadshah_: 2016-06-24 11:02:48

HINT for min Entrance fee
dp[n][m]=max Fun with n elements and m money
dp[n][m-1]=max Fun with n elements and m-1 money
so we have to find least j (dp[n][j]) for which we get dp[n][j]=dp[n][m] :)

baadshah_: 2016-06-24 10:59:30

Can be Done using 1D dp array[] !!Finally AC
For min entrance fees no need for backtracking

sonali9696: 2016-06-11 13:48:54

Key to getting minimum fees for same total fun - think simple by observing array else you will end up thinking all sorts of complicated methods like me to get answer :P

Added by:Patryk Pomykalski
Time limit:3s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Resource:Swiss Olympiad in Informatics 2004