#include "bits/stdc++.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vector<int>;
using vl = vector<ll>;
using vvi = vector<vi>;
using vvl = vector<vl>;
const ll INF = 1LL << 60;
const ll MOD = 1000000007;
template <class T>
bool chmax(T &a, const T &b) {
    return (a < b) ? (a = b, 1) : 0;
}
template <class T>
bool chmin(T &a, const T &b) {
    return (b < a) ? (a = b, 1) : 0;
}

int main() {
    string n;
    getline(cin, n);
    string s;
    getline(cin, s);
    bool ok = true;
    for (int i = 0; i < s.size(); ++i) {
        if (s[i] == ' ')
            ok = false;
    }
    if (ok) {
        vi a(3);
        a[0] = stoi(s);
        cin >> a[1] >> a[2];
        set<int> b;
        b.insert(a[0] + a[1]);
        b.insert(a[1] + a[2]);
        b.insert(a[2] + a[0]);
        cout << *next(b.rbegin()) << "\n";
    } else {
        cout << "\"assert\""
             << "\n";
    }
    return 0;
}