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

int main() {
  int n, i = 0;
  string S[4];
  while ((n = getchar()) != -1) {
    if (n == 32) return cout << "\"assert\"" << "\n", 0;
    if (n == 10) i++;
    else S[i] += (char) n;
  }
  long a = stol(S[1]), b = stol(S[2]), c = stol(S[3]);
  set<long> SE = {a + b, b + c, c + a};
  cout << *next(rbegin(SE)) << "\n";
}