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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.


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.


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



Example 2



hide comments
Junaid: 2015-12-27 12:53:05

Nice problem......AC in one go.....all testcases given in comments helped a lot....Thanks for those...

Shubham Gupta: 2015-12-24 22:51:50

I had multiple wa(s) just because i was reading i/p using strings. Changed it to scanf(" %d / %d ",&a,&b) and got ac.

codelover25: 2015-12-19 16:46:11

Can any one explain why having 4 friends who want 1/4th pizza each lead to an answer of 3? Shouldn't the answer be 2? I am testing it with spoj toolkit.

alexbandeira: 2015-09-26 02:36:03

List + quicksorte
The biggest challenge to date
Tnks Spoj , tnk boys by inputs

golden egg : think of working with the data sorted descending , so do not mistake!

Last edit: 2015-09-26 02:38:08
Parul Yadav: 2015-08-20 12:04:12

my 150th

Rajat Varshney: 2015-08-19 22:40:00

Good Problem to learn....

Kriti Singhal: 2015-08-05 06:46:57

i am getting correct answers for all the test cases...still showing wrong answer... :(
can sm1 pls hlp...

Last edit: 2015-08-05 11:08:14
snehil10111995: 2015-08-01 05:35:55

My code does satisfy all the test cases given in the problem and comments, but still my code isn't accepted here. Frustrated!

a1s1_7: 2015-07-15 07:51:02

Can someone please tell whats going wrong in my code.
I tried all the test cases but it's failing for the 9th test case.
Can anyone provide me with the test case for which the code is failing?
Thanks in advance

Last edit: 2015-08-05 11:08:01
tjain1999: 2015-07-13 03:01:39

WA at 6th case Can you tell me what is the 6th case ? So i can find my mistake

Added by:Kawmia Institutes
Time limit:0.204s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ASM64 BF LISP sbcl LISP clisp JS-RHINO LUA OBJC PHP VB.NET
Resource:Croatian Highschool Competitions in Informatics 2004