zan_nabil

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int siz;
double stack_c[100000];
char que[1000];
void push(double cost)
{
    siz++;
    stack_c[siz] = cost;
    return;

}
double pop()
{
    double q = stack_c[siz];
    siz--;
    return q;

}
void init()
{
    siz = 0;
}

int main()
{
    init();
    printf("sale format: s 12/34/18 2.30 pm 120 1.67\n");
    printf("receipt format: r 12/34/18 2.30 pm 120 1.67\n");
    printf("-1 for exit\n");

    while(1)
    {
        gets(que);
        //printf("%s\n",que);
        if(que[0]=='-' && que[1]=='1')
        {
            break;
        }
        else if(que[0]=='r')
        {
            //printf("receipt taken\n");
            int len = strlen(que);
            int typ = 0; // 1 for integer -1 for decimal
            int dotpos = len;
            for(int i=len-1; i>=0; i--)
            {
                if(que[i]=='.')
                {
                    typ = -1;
                    dotpos = i;
                    break;
                }
                if(que[i]==' ')
                {
                    typ = 1;
                    break;
                }
            }

            double po = 1;
            double num = 0;
            int gappos = len-1;
            for(int i=dotpos-1; i>=0; i--)
            {
                if(que[i]==' ')
                {
                    gappos = i;
                    break;
                }
                num += ((int)(que[i]-'0'))*po;
                po*=10;
            }

            if(typ==-1)
            {
                po = 0.1;
                for(int i=dotpos+1; i<=len-1; i++)
                {
                    num += ((int)(que[i]-'0'))*po;
                    po/=10;
                }
            }


            int num2 = 0;
            int po2 = 1;

            for(int i=gappos-1; i>=0; i--)
            {
                if(que[i]==' ')
                {
                    //gappos = i;
                    break;
                }
                num2 += ((int)(que[i]-'0'))*po2;
                po2*=10;
            }

            printf("receipt taken %d items at %f per item\n",num2,num);

            for(int i=1; i<=num2; i++)
            {
                push(num);
            }
            printf("Current items: %d\n",siz);

        }
        else if(que[0]=='s')
        {
            int po = 1;
            int num = 0;
            int len = strlen(que);
            for(int i=len-1; i>=0; i--)
            {
                if(que[i]==' ')
                {
                    break;
                }
                num += ((int)(que[i]-'0'))*po;
                po*=10;
            }
            double last_p;
            int siz2 = 0;
            int sizc = siz;
            if(siz!=0)
            {
                //siz2++;
                last_p = stack_c[siz];
            }

            siz--;

            int cnt = 1;

            while(siz>0 && cnt<num)
            {
                double price = stack_c[siz];
                if(fabs(price-last_p)>0.1)
                {
                    printf("%d SCREWDRIVERS SOLD AT RM %f\n",cnt,last_p);
                    cnt = 1;
                    last_p = price;
                    siz--;
                }
                else
                {
                    cnt++;
                    siz--;

                }



            }

            printf("%d SCREWDRIVERS SOLD AT RM %f\n",cnt,last_p);





            printf("sale done\n");
        }



    }



    return 0;
}