#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  cout << max(a + (b * c),
              max(a * (b + c),
                  max(a * b * c, max((a + b) * c, max(a + b + c, a * b + c)))));
  return 0;
}
