Question is given fruit number should be even. Half of it is apples and half banana. Takes 3 apples to make one pie. I

Question

This is my code below which asks input as number of fruits and number of pies as output. My code fails 3 out of 5 test conditions.
Please help!!!
#include <stdio.h>
int b(int c);
int main() {
int fruit;
int a;
scanf("%d", &fruit);

if(fruit>=6 && fruit%2==0)
{a=b(fruit);
printf("%d",a);}
else{
printf("0");}

return 0;
}
int b(int c)
{int apples;
int pies;
apples=c/2;
pies=apples/3;
return(pies);
}