#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  while (~scanf("%d %d %d", &a, &b, &c)) {
    int ans = a + b + c;
    ans = max(ans, a * b * c);
    ans = max((a + b) * c, ans);
    ans = max(a * (b + c), ans);
    printf("%d\n", ans);
  }
  return 0;
}
