#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  cin.ignore();
  string s;
  getline(cin, s);
  if (s.find(' ') != string::npos) {
    cout << "\"assert\"" << endl;
    return 0;
  }
  ll a = stoll(s);
  ll b, c;
  cin >> b >> c;
  vector<ll> v = { a + b, b + c, c + a };
  sort(v.rbegin(), v.rend());
  v.erase(unique(v.begin(), v.end()), v.end());
  cout << v[1] << endl;
  return 0;
}