/************************************************

* Author        :Running_Time

* Created Time  :2015/10/28 星期三 19:21:49

* File Name     :C.cpp

 ************************************************/

#include <cstdio>

#include <algorithm>

#include <iostream>

#include <sstream>

#include <cstring>

#include <cmath>

#include <string>

#include <vector>

#include <queue>

#include <deque>

#include <stack>

#include <list>

#include <map>

#include <set>

#include <bitset>

#include <cstdlib>

#include <ctime>

using namespace std;

#define lson l, mid, rt << 1

#define rson mid + 1, r, rt << 1 | 1

typedef long long ll;

const int N = 1e5 + 10;

const int INF = 0x3f3f3f3f;

const int MOD = 1e9 + 7;

const double EPS = 1e-10;

const double PI = acos (-1.0);

int main(void)    {

    int n;

    int a[5];

    while (scanf ("%d", &n) == 1)   {

        memset (a, -1, sizeof (a));

        int ans = 0;

        for (int i=0; i<n; ++i) scanf ("%d", &a[i]);

        if (n <= 3) {

            ans = 1024;

        }

        else    {

            int S = 1 << 5;

            for (int i=0; i<S; ++i) {

                int num = __builtin_popcount (i);

                if (num != 3)   continue;

                int x = 0, y = 0, sum = 0, sum2 = 0;

                for (int j=0; j<5; ++j) {

                    if (i & (1 << j))   {

                        if (a[j] == -1)  x++;

                        else sum += a[j];

                    }

                    else    {

                        if (a[j] == -1)  y++;

                        else    sum2 += a[j];

                    }

                }

                if (!x && sum % 1024 != 0) continue;

                if (y)  ans = max (ans, 1024);

                else    {

                    ans = max (ans, (sum2 - 1) % 1024 + 1);

                }

            }

        }

        printf ("%d\n", ans);

    }

    //cout << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";

    return 0;

}