#include <bits/stdc++.h> using namespace std; int main(){ int N; cin >> N; vector<int> A(N); for (int i = 0; i < N; i++){ cin >> A[i]; } if (N >= 16){ cout << (1 << 16) - 1 << endl; } else { vector<vector<bool>> dp(N + 1, vector<bool>(1 << 16, false)); dp[0][0] = true; for (int i = 0; i < N; i++){ vector<int> B(16); B[0] = A[i]; for (int j = 0; j < 15; j++){ B[j + 1] = B[j] / 2 + ((B[j] % 2) << 15); } for (int j = 0; j < (1 << 16); j++){ if (dp[i][j]){ for (int k = 0; k < 16; k++){ dp[i + 1][j | B[k]] = true; } } } } int ans = 0; for (int i = 0; i < (1 << 16); i++){ if (dp[N][i]){ ans = max(ans, i); } } cout << ans << endl; } }