#include <bits/stdc++.h>
#define rep(i,n) for (int i =0;i < (n); ++i)
using namespace std;
typedef long long ll;


int check(string s){
    for (auto &&i : s){
        if (i==' ')return 0;
    }
    return 1;
}


int main() {
    int n;
    cin>>n;
    scanf("\n");
    string s;
    getline(cin,s);
    if(check(s)){
        vector<ll> ar(3);
        ll ans;
        ar[0]=stoll(s);
        rep(i,2) cin>>ar[i+1];
        sort(ar.begin(),ar.end());
        ans = ar[0]==ar[1] ? ar[0]*2 : ar[0]+ar[2];
        cout<<ans<<endl;
    }else{
        cout<<"\"assert\""<<endl;
    }
    return 0;
}