/*
Telebe of Adicto && Mamedov yani AzeTurk810
I see humans but no humanity
*/
#include <algorithm>
#include <cassert>
#include <iostream>
#include <vector>
// mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using ll = long long;
using namespace std;
#define ln '\n'
#define INFi 1e18
#define INFll 1e18
#ifdef ONPC
#include <algo.hpp>
#else
#define dbg(...)
#define dbg_out(...)
#endif
#define int ll
constexpr int K = 60; // 505
char solve() {
int N, A, B;
if (!(cin >> N >> A >> B))
return 1;
vector<int> Y(N + 1), pref(N + 1);
for (int i = 1; i <= N; i++)
cin >> Y[i];
for (int i = 1; i <= N; i++) {
pref[i] = pref[i - 1] + Y[i];
}
auto sum = [&](int r, int l) {
assert(l <= r);
assert(r <= pref.size());
assert(l >= 1);
return pref[r] - pref[l - 1];
};
ll ans = 0;
ll forbidden = 0;
ll tot = pref[N];
int mxBit = 0;
if (tot > 0) {
mxBit = 63 - __builtin_clzll(tot);
} else
mxBit = 0;
for (int bit = mxBit; bit >= 0; --bit) {
ll tar = forbidden | (1LL << bit);
vector<vector<int>> g(N + 1);
for (int i = 0; i < N; i++) {
for (int j = i + 1; j <= N; j++) {
ll s = sum(j, i + 1);
dbg(i);
if ((s & tar) == 0) {
g[i].push_back(j);
}
}
}
dbg("S");
vector<char> cur(N + 1, 0), nxt(N + 1, 0);
cur[0] = 1;
char ok = false;
for (int grp = 0; grp < B; grp++) {
fill(nxt.begin(), nxt.end(), 0);
bool any = false;
for (int pos = 0; pos < N; pos++) {
if (!cur[pos]) {
continue;
}
const auto &adj = g[pos];
for (const int &j : adj) {
if (!nxt[j]) {
nxt[j] = 1;
any = true;
}
}
}
if ( (grp + 1) >= A && (grp + 1) <= B && nxt[N]) {
ok = true;
break;
}
if (!any)
break;
cur.swap(nxt);
}
if (ok) {
forbidden = tar;
} else {
ans |= (1LL << bit);
}
}
cout << ans << ln;
return 0;
}
// Attack on titan<3
signed main() {
ios::sync_with_stdio(0);
cin.tie(nullptr);
int t = 1e9;
// cin >> t;
for (int cases = 0; cases < t; cases++) {
if (solve())
break;
#ifdef ONPC
cerr << "__________\n";
#endif
}
}
// Just Imaginary
/*
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣀⠀⠀⠀⢀⣴⣾⠀⠀⠀⡀⢀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣦⣾⣿⣿⣿⣿⣿⡆⠁⠀⢀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠹⣿⣿⣿⣿⣿⣿⣿⣿⡿⠁⠀⡠⠂⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⠠⠔⠚⣿⣿⣿⣿⣿⣦⡄⠀⠁⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⢀⠠⠐⢂⠉⡀⣀⣤⣄⢻⣿⣿⡟⢈⡹⣿⡀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⡀⠄⠂⠈⠀⣶⣤⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠘⣷⡀⠀⡀⠐⠂⠐⢄
⠀⠀⠀⠀⠀⠀⠀⣿⣿⠟⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣀⣾⣷⠯⠀⠤⠤⠄⠈
⠀⠀⠀⠀⠀⠀⣼⣿⡟⠀⠀⣹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣄⡀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⣰⣿⠋⠀⠀⢠⣾⣿⣿⣿⣿⣿⣭⠟⢻⣿⣿⣿⣿⡿⠁⠀⠀⠀⠀
⠀⠀⠀⣀⣶⡟⠁⠀⢾⣶⣿⠟⠉⠈⢻⣿⣿⣿⣦⣜⠀⠛⠛⠿⠁⠀⠀⠀⠀⠀
⠚⠻⠿⠿⡿⠁⠀⢠⣿⣿⠁⠀⣠⠖⠋⠉⠻⣿⣿⣿⣶⡀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⣰⣿⡿⠃⠠⠊⠁⠀⠀⠀⠀⠈⢿⣿⣿⠟⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⢀⣴⡿⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⣠⣾⠏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⢀⣴⠾⠟⠛⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
*/
