PIZZA

Saturday, 11 August 2012
PIZZA


SPOJ Problem Set (classical)


7169. Pizza


Problem code: EGYPIZZA




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 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 , 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


Example

Input:
3

1/2

3/4

3/4

Output:
4

Input:

5

1/2

3/4

1/2

1/4

1/4

Output:

4




#include
int main()
{
        int t,a,b,i,half=0,quarter=0,third_quarter=0,pizza=0;
        char c;
        scanf("%d",&t);
        for(i=0;i
        {
                scanf("%d%c%d",&a,&c,&b);
                if(a==1&&b==2)
                        half=half+1;
                else if(a==1&&b==4)
                        quarter=quarter+1;
                else
                        third_quarter=third_quarter+1;
        }
        if(quarter==0)
        {
                pizza=third_quarter+(half/2)+(half%2);
        }
        else{
                if(quarter<=third_quarter)
                        pizza=third_quarter+(half/2)+(half%2);
                if(quarter>third_quarter)
                {
                        pizza+=third_quarter;
                        quarter=quarter-third_quarter;
                        if(quarter>2*half)
                        {
                                pizza+=half+(2*half-quarter);
                        }
                        else if(quarter==2*half)
                        {
                                pizza+=half;
                        }
                        else if(quarter<2 font="font" half="half">
                        {
                                int half1;
                                half1=(quarter/2)+(quarter%2);
                                half=half-half1;
                                pizza+=half1+(half/2)+(half%2);
                        }
                }
        }
        printf("%d\n",pizza+1);
        return 0;
}