#include<stdio.h>
#include<math.h>
int main(){
int a,b,c,d,e,v,f,v1,v2;
while(scanf("%d %d %d %d %d",&a,&b,&c,&d,&e)!=EOF){
if(a>b)
	f=b;
else
	f=a;
if(f>c)
	f=c;
else
	f=f;
	 if(d<e)
		 v=a*b*c-2*(a-2*e)*(b-2*e)*d-2*(a-2*e)*(c-2*e)*d-2*(b-2*e)*(c-2*e)*d;
	 else if(d*2>=f)
		 v=a*b*c-(a-2*e)*(b-2*e)*(c-2*e)-(a-2*e)*(b-2*e)*e*2-(a-2*e)*(c-2*e)*e*2-(c-2*e)*(b-2*e)*e*2;
	 else{
		 v1=a*b*c-(a-2*e)*(b-2*e)*(c-2*e)-(a-2*e)*(b-2*e)*e*2-(a-2*e)*(c-2*e)*e*2-(c-2*e)*(b-2*e)*e*2;
		 v2=(a-2*d)*(b-2*d)*(c-2*d);
		 if(v1>v2)
			 v=v1;
		 else
			 v=v2;
	 }
	 printf("%d\n",v);}


}