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

int main() {
    int n;
    cin>>n;
    cin.ignore();
    string s;
    getline(cin, s);
    if (count(s.begin(), s.end(), ' ') > 0) {
        cout << "\"assert\"" << endl;
        return 0;
    }
    ll a, b, c;
    a = stoll(s);
    cin>>b>>c;
    if (a==b||a==c||b==c) cout << min(a, b) + min(b, c) << endl;
    else cout << min(a, min(b, c)) + max(a, max(b, c)) << endl;
    return 0;
}