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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
swagnik dutta: 2013-12-28 11:49:55

will abotrika prefer to eat one whole(uncut) pizza or she would prefer to eat pieces like(3/4 and 1/4),(1/2 and 1/2) etc?

Python: 2013-12-23 16:56:29

9th case :D

Martijn Muijsers: 2013-10-18 15:08:08

@Satyaki I had that too. Turned out I made a mistake first, but had to use the logic *Number of half pizzas % 2 = 1 => two less quarter pizzas to process later*

Satyaki Upadhyay: 2013-09-11 19:47:19

i keep getting WA after running(9)...
can anyone help pls??

abhiruchi: 2013-09-03 08:19:03

ac :D my 50th!!

Aswin Murugesh: 2013-08-27 12:11:57

AC after 7 WA :)

californiagurl: 2013-08-25 08:02:55

i don't understand why i'm getting WA....are those '\n's before each line of input?if so, how to take care of it?

if ulook up my submission profile for this one, u'll know exactly how frustrated i have been for these last couple of days.....finally AC in 0.00sec !!!!

Last edit: 2013-08-27 05:50:54
(Tjandra Satria Gunawan)(曾毅昆): 2013-08-22 03:37:22

my greedy program will fail for this case:

Finally AC after analyzing with case above.

ROHIT KUMAR: 2013-08-08 07:22:11

"AC" in a go :)
jst take care of "....all of them wants his amount of pizza in one slice" :) :) :)

sumanth kumar: 2013-08-08 06:58:27

Last edit: 2013-08-08 07:01:36

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