GPA

#include<stdio.h>
int main()
{
    int subject,i,number,count=0;
    float gp=0.00,gpa;
    scanf("%d",&subject);
    printf("\n\n\n");
    for(i=0;i<subject;i++)
    {
     scanf("%d",&number);

     if(number>=80 && number<=100)
     {
         gp=gp+5.00;
     }
     else if(number>=70 && number<=79)
     {
         gp=gp+4.00;
     }
     else if(number>=60 && number<=69)
     {
         gp=gp+3.50;
     }
     else if(number>=50 && number<=59)
     {
         gp=gp+3.00;
     }
     else if(number>=40 && number<=49)
     {
         gp=gp+2.00;
     }
     else if(number>=33 && number<=39)
     {
         gp=gp+1.00;
     }
     else if(number<33)
     {
         count=count+1;
         gp=gp+0.00;
     }
     else
     {
         printf("ERROR");
     }

    }
    if(count==0)
    {
     gpa=gp/subject;
    printf("\n\n%0.2f",gpa);
    }
    else
    {
        gpa=0.00;
        printf("\n\n%0.2f",gpa);
        printf("\nF%d",count);
    }
return 0;
}