#include "bits/stdc++.h"
#define sz(x) (int)size(x)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const char nl = '\n';
const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3f;
template<typename T>
void chmin(T &a, T b) { if (b < a) a = b; }
int32_t main() {
ios::sync_with_stdio(0), cin.tie(0);
int n, a, b; cin >> n >> a >> b;
vector<int> y(n); for (auto &x : y) cin >> x;
vector<ll> p(n); p[0] = y[0];
for (int i = 1; i < n; i++)
p[i] = p[i - 1] + y[i];
ll ans = 0;
for (int bit = 40; bit >= 0; bit--) {
auto ok = [&](ll sum) -> bool {
if (sum & (1LL << bit)) return false;
for (int i = 40; i > bit; i--)
if (!(ans & (1LL << i)) && (sum & (1LL << i)))
return false;
return true;
};
vector<int> dp(n, INF);
if (ok(y[0])) dp[0] = 1;
for (int i = 1; i < n; i++) {
if (ok(p[i]))
dp[i] = 1;
for (int j = 0; j < i; j++)
if (ok(p[i] - p[j]))
chmin(dp[i], dp[j] + 1);
}
if (dp[n - 1] > b)
ans += (1LL << bit);
}
cout << ans << nl;
return 0;
}
