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PIZZAS  Pizza (challenge) 
Abotrika is having a party because his team won the african cup so he is inviting his friends to eat some pizza. Unfortunately, Abotrika's 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 sliceseither 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), 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 order.
Don't forget to order one complete pizza for Abotrika.
Examples
Input: 3
1/2
3/4
3/4
Output: 4
Input:
5
1/2
3/4
1/2
1/4
1/4
Output:
4
Added by:  Piotr Ką kol 
Date:  20100819 
Time limit:  5.039s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: NODEJS OBJC SCM qobi VB.NET 
Resource:  Copy of Mohamed Maher's task EGYPIZZA. 
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20130622 12:30:07 Jander
@pardeep  Everyone wants their portion of pizza to be a single piece, ie 3/4 must be one single piece, and cannot be 1/4 + 1/2. Therefore for the first test case there have to be 4 pizzas = 1 (Abotrika's) + 2 (for the 3/4s) + 1 (for the 1/2). There will of course then be spare pieces :) 

20130621 10:07:57 pardeep kumar
how the o/p of first test case is 4.Please explain. 

20100825 15:21:23 Wendel Scardua
I guess I should buy some glasses :) Sorry for any inconvenience 

20100825 09:31:08 Piotr KÄ…kol
They aren't. ;) $p14=$p34 if $p34>=$p14;  WA
$p14=$p34;  AC
Last edit: 20100825 09:33:06 

20100825 01:06:07 Wendel Scardua
Ok, that was weird. 3949253 gives 21, but the next submit, 3950501, gives 18 and still got WA. After that, I posted this question. Now, I tried submitting this last version again ( 3960192 ) and it got AC. I just checked, 3960192 and 3950501 are identical. 

20100822 20:33:33 Piotr KÄ…kol
For test with 10 "1/2"'s, 10 "3/4"'s and 17 "1/4"'s the answer is 18 while Your program print 21. ;) 

20100822 15:06:01 Wendel Scardua
I don't get why I got WA. I saw the comments on EGYPIZZA (and yes, the code gets AC there), but I tried all kinds of tests  even those on your comment there. 4 1/4 1/4 1/4 1/4 results 2 and 3 1/4 1/2 1/4 results 2 too. I think I'm missing something, but I can't see what it is... 