#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  scanf("%d%d%d", &a, &b, &c);
  printf("%d",
         max((a + b) * c,
             max(a + b * c,
                 max(a * b + c, max(a * (b + c), max(a * b * c, a + b + c))))));
}
