#include <iostream>
#include <algorithm>
#include <cstdlib>
using namespace std;
int main(){
    string N,A[3];
    getline(cin,N);
    for(int i=0;i<3;i++){
        getline(cin,A[i]);
    }
    if(A[1]!=""){
        int a[3];
        for(int i=0;i<3;i++){
            a[i]=atoi(A[i].c_str());
        }
        sort(a,a+3);
        if(a[0]==a[1])cout << a[0]+a[1] <<endl;
        else if(a[1]==a[2])cout<< a[0]+a[1] <<endl;
        else cout << a[0]+a[2] << endl;
    }else cout << "\"assert\"" << endl;
    return 0;
}