#define _USE_MATH_DEFINES
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<numeric>
#include<queue>
#include<deque>
#include<stack>
#include<set>
#include<map>
#include<random>
using namespace std;
typedef long long ll;
const int mod=998244353;
int main(){
	ll n,a[3];
	string s;
	cin>>n;
	cin.ignore();
	getline(cin,s);
	if(s.contains(' '))
		cout<<"\"assert\""<<endl,exit(0);
	a[0]=stoll(s);
	cin>>a[1]>>a[2];
	sort(a,a+3);
	if(a[0]==a[1])
		swap(a[1],a[2]);
	cout<<a[0]+a[2]<<endl;
}