#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, ar[10];
  cin >> a >> b >> c;
  ar[0] = a + b + c;
  ar[1] = a * b * c;
  ar[2] = a + b * c;
  ar[3] = a * b + c;
  ar[4] = (a + b) * c;
  ar[5] = a * (b + c);
  sort(ar, ar + 6);
  cout << ar[6 - 1];
}
