EGYPIZZA - Pizza

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Abotrika is having a party because his team won the African cup so he is inviting his friends to eat some pizza. Unfortunately, his friends can't eat an entire pizza but all of them know exactly how much pizza they can eat and insist on getting the exact amount of pizza but Abotrika eats one complete pizza and all of them wants his amount of pizza in one slice. Their requests break down to three different pizza slices-either one quarter or a half or three quarters of pizza.

Write a program that will help Abotrika to find out what is the minimal number of pizzas he has to order so that everyone gets exact amount of pizza they want.

Input

First line contains an integer N, 0 ≤ N ≤ 10 000, the number of friends. In each of next N lines there is amount of pizza that each of Abotrika's friends wants to eat,that is the fraction 1/4, 1/2 or 3/4.

Output

In the first and only line you should write the minimal number of pizzas Abotrika has to order don't forget to order one complete pizza for Abotrika.

Example 1

Input:
3
1/2
3/4
3/4

Output:
4

Example 2

Input:
5
1/2
3/4
1/2
1/4
1/4 

Output:
4

hide comments
Anirudh Goyal: 2012-05-17 15:04:04

ANybody give some more test cases !!!

Anirudh Goyal: 2012-05-17 06:28:35

provide some more test cases plz....
getting wrong answer....

strings: 2012-03-18 19:05:52

has it got some tricky sort of test cases??? i am getting wa, but got right ans for tests i made...
am i missing something???
my submission no. 6681199, pls check...

saket diwakar: 2012-03-16 19:31:04

ufffff..a silly mistake costs me 11 WA's....what the hell.......

Yashodhan S. Katte: 2012-03-04 07:15:40

all of them wants their(not his) amount of pizza in one slice.

Garima Sachan: 2012-02-21 20:00:46

Abotrika eats one complete pizza
and all of them wants his amount of pizza in one slice.

Pluston: 2012-02-21 14:35:53

Can any one explain why output is 4 in first case?
All pizzas are of same size,right?

Last edit: 2012-02-21 14:46:54
Thomas Lehmann: 2012-02-15 19:20:39

The second example I can understand:
1/2 + 1/2 = 1
3/4 + 1/4 = 1
So you have 2 + 1/4 but you need 3 pizzas
and one additional for Abotrika -> Example says 4 -> fine!

The first one I don't understand:
1/2 + 3/4 + 3/4 = 2
So I take 2 and one for Abotrika, which is 3
but the example says 4, why?

Ahhh ... a minute later ... (sorry) ... I got it.

Last edit: 2012-02-15 19:22:41
saket diwakar: 2012-01-06 05:56:49

getting again and again wrong answer..can anyone please give me any case that i m missing?????

Prakhar Jain: 2011-12-01 12:47:36

print just a new line after your answer...


Added by:Kawmia Institutes
Date:2010-08-18
Time limit:0.204s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
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Resource:Croatian Highschool Competitions in Informatics 2004