#include <stdio.h>
#include <stdlib.h>
main()
{
int a,b,c;
scanf("%d%d%d",&a,&b,&c);
if(a==1&&b==1&&c==1)
{printf("3");
exit(0);};
if(a==1||b==1||c==1)
{
if(a==1)
{
if(c==1){printf("%d",a+b+c);exit(0);}
else printf("%d",(a+b)c);exit(0);}
if(b==1)
{
if(a>=c){printf("%d",(b+c)a);exit(0);}
else {printf("%d",(a+b)c);exit(0);}
};
if(c==1)
{printf("%d",a(b+c));exit(0);}
}
else printf("%d",abc);
}