#include <iostream>

using namespace std;

int main()

{

int a, b, c, Max;

while (cin >> a >> b >> c)

{

Max = 0;

// 用一次運算符

if (Max < ((a * 10 + b) + c))

Max = (a * 10 + b) + c;

if (Max < (a + (b * 10 + c)))

Max = a + (b * 10 + c);

if (Max < ((a * 10 + b) * c))

Max = (a * 10 + b) * c;

if (Max < (a * (b * 10 + c)))

Max = a * (b * 10 + c);

// 用兩次運算符

if (Max < a + b + c)

Max = a + b + c;

if (Max < a * b * c)

Max = a * b * c;

if (Max < a + (b * c))

Max = a + (b * c);

if (Max < (a * b) + c)

Max = (a * b) + c;

cout << Max << endl;

}

}