#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(void){
    //int n; cin>>n;
    string str;
    getline(cin,str);
    string str2;
    if(!getline(cin,str2)) {cout<<"assert"<<endl; return 0;}
    //cout<<str2<<endl;
    string str3;
    if(!getline(cin,str3)) {cout<<"assert"<<endl; return 0;}
    //cout<<str3<<endl;
    string str4;
    if(!getline(cin,str4)) {cout<<"assert"<<endl; return 0;}
    //cout<<str4<<endl;
    int a = stoll(str2); int b = stoll(str3); int c = stoll(str4);
    //cout<<a<< b<<c<<endl;
    vector <int> ans;
    ans.push_back(a+b); ans.push_back(c+b); ans.push_back(a+c);
    sort(ans.begin(),ans.end());
    ans.erase(unique(ans.begin(), ans.end()), ans.end());
    sort(ans.begin(),ans.end());
    cout<<ans[ans.size()-2]<<endl;
}