#include <stdio.h>
int main(){
	int a,b,c,d,e,v1,v2,v3;
	while(scanf("%d%d%d%d%d",&a,&b,&c,&d,&e)!=EOF){
		v1=a*b*c;
		if(d<e){
		v2=2*d*(a-2*e)*(b-2*e)+2*d*(a-2*e)*(c-2*e)+2*d*(b-2*e)*(c-2*e);
		printf("%d\n",v1-v2);
	}
	else if(2*d>=a||2*d>=b||2*d>=c){
		v2=(a-2*e)*(b-2*e)*(c-2*e)+2*e*(a-2*e)*(b-2*e)+2*e*(a-2*e)*(c-2*e)+2*e*(b-2*e)*(c-2*e);
		printf("%d\n",v1-v2);
	}
	else{
		v3=(a-2*e)*(b-2*e)*(c-2*e)+2*e*(a-2*e)*(b-2*e)+2*e*(a-2*e)*(c-2*e)+2*e*(b-2*e)*(c-2*e);
		v2=(a-2*d)*(b-2*d)*(c-2*d);
		if(v2>(v1-v3)){
			printf("%d\n",v2);
		}else
		{
			printf("%d\n",v1-v3);
		}
	}
	}
	return 0;
}