#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,c,x,y,s=0;
	scanf("%d %d %d %d %d",&a,&b,&c,&x,&y);
	if(c<a+b)
	{
		s=(x+y-abs(x-y))/2*c+(x>y?a*(x-y):b*(y-x);
		printf("1");
	}
	else
	{
		s=a*x+b*y;
	}
	printf("%d",s);
	return 0;
}