#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
cin.tie(0)->sync_with_stdio(0);
int n, a, b;
cin >> n >> a >> b;
vector<int> vi(n);
for (auto &a : vi)
cin >> a;
vector<vector<ll>> vvi(n, vector<ll>(n));
vector<array<ll, 3>> elist;
for (int i = 0; i < n; i++) {
vvi[i][i] = vi[i];
elist.push_back({i, i + 1, vvi[i][i]});
for (int j = i + 1; j < n; j++) {
vvi[i][j] = vvi[i][j - 1] + vi[j];
elist.push_back({i, j + 1, vvi[i][j]});
}
}
ll ans = 0;
const int logn = 50;
for (int i = logn; i >= 0; i--) {
vector<array<ll, 3>> cure;
vector<vector<pair<int, ll>>> adj(n);
vector<ll> dp(n + 1, n + 3);
for (auto a : elist)
if ((a[2] & (1ll << i)) == 0)
adj[a[0]].push_back({a[1], a[2]});
dp[0] = 0;
for (int i = 0; i < n; i++)
for (auto a : adj[i])
dp[a.first] = min(dp[a.first], dp[i] + 1);
if (dp.back() <= b) {
elist.clear();
for (int i = 0; i < n; i++)
for (auto a : adj[i])
elist.push_back({i, a.first, a.second});
} else {
ans += (1ll << i);
}
}
cout << ans << '\n';
}
