#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
    // read in the three integers
    int a, b, c;
    cin >> a >> b >> c;

    // generate all possible orderings of the operators
    vector<char> operators {'+', '-', '*', '/'};
    vector<vector<char>> orders;
    for (char op1 : operators) {
        for (char op2 : operators) {
            for (char op3 : operators) {
                orders.push_back({op1, op2, op3});
            }
        }
    }

    // iterate through all possible orderings of the operators
    int min_result = 1000;
    for (auto order : orders) {
        // apply the operators to the three integers
        int result = a;
        for (char op : order) {
            if (op == '+') {
                result += b;
            } else if (op == '-') {
                result -= b;
            } else if (op == '*') {
                result *= b;
            } else if (op == '/') {
                if (result % b == 0) {
                    result /= b;
                } else {
                    // skip this order if integer division is not possible
                    break;
                }
            }
            b = c;
        }

        // update the minimum non-negative result
        if (result >= 0 && result < min_result) {
            min_result = result;
        }
    }

    // output the minimum non-negative result
    cout << min_result << endl;

    return 0;
}