#include <bits/stdc++.h>
using namespace std;
int solve(int i, int a, int b, int c) {
  if (i == 0) return a + b + c;
  if (i == 1) return max((a + b) * c, a + b * c);
  if (i == 2) return max(a * (b + c), a * b + c);
  return a * b * c;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int a, b, c;
  cin >> a >> b >> c;
  int ans = 0;
  for (int i = 0; i < 4; ++i) {
    ans = max(ans, solve(i, a, b, c));
    ans = max(ans, solve(i, c, b, a));
  }
  cout << ans << endl;
  return 0;
}
