#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;
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 dp(n, vector<int>(b + 1));
for (int i = 0; i < n; i++)
dp[i][1] = ok(p[i]);
for (int i = 1; i < n; i++)
for (int k = 1; k <= b; k++)
for (int j = 0; j < i; j++)
if (ok(p[i] - p[j]))
dp[i][k] |= dp[j][k - 1];
bool f = true;
for (int k = a; k <= b; k++)
if (dp[n - 1][k] == true)
f = false;
if (f)
ans += (1LL << bit);
}
cout << ans << nl;
return 0;
}
