a=int(input())
b=int(input())
c=int(input())
p1=a+b*c
p2=a*(b+c)
p3=a*b*c
p4=(a+b)*c
p5=a+b+c
print(max(p1,p2,p3,p4,p5))
#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b,c;
cin>>a>>b>>c;
int ara[]={a*b*c, a*b+c, a*(b+c), a+b*c, (a+b)*c, a+b+c};
int mx=0;
for(int i=0;i<6;i++)
mx=max(mx,ara[i]);
cout<<mx<<endl;
return 0;
}
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