#include <bits/stdc++.h>
using namespace std;

#define ll long long

void solve(){
    ll a, b, c;
    cin >> a >> b >> c;

    vector<ll> v;
    v.push_back(a + b + c);
    v.push_back(a + b - c);
    v.push_back((a + b) * c);
    if((a + b)%c == 0) v.push_back((a + b) / c);

    v.push_back(a - b - c);
    v.push_back(a - b + c);
    v.push_back((a - b) * c);
    if(abs(a-b)%c == 0) v.push_back((a - b) / c);

    v.push_back((a * b) + c);
    v.push_back((a * b) - c);
    v.push_back(a * b * c);
    if((a*b)%c == 0) v.push_back((a * b) / c);

    if(a%b == 0) v.push_back((a / b) + c);
    if(a%b == 0) v.push_back((a / b) - c);
    if(a%b == 0) v.push_back((a / b) * c);
    if(a%b == 0 && (a/b)%c == 0) v.push_back((a / b) / c);
    
    sort(v.begin(), v.end());

    for(ll i = 0; i < (ll)v.size(); i++){
        if(v[i] >= 0){
            cout << v[i];
            break;
        }
    }
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    //cin >> t;
    while(t--){
        cout << fixed << setprecision(15);
        solve();
    }

    return 0;
}