#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mxN = 2e3+10;
int dp1[mxN][mxN], dp2[mxN];
int N, A, B;
int Y[mxN];
ll msk, ans;
int fun2(int idx, int grp) {
if (grp > B)
return 0;
if (idx == N)
return (A <= grp && grp <= B);
int &ret = dp1[idx][grp];
if (~ret) return ret;
ret = 0;
ll sum = 0;
for (int i = idx; i < N; ++i) {
sum += Y[i];
if (!(sum & msk))
ret |= fun2(i+1, grp+1);
}
return ret;
}
bool check2() {
memset(dp1, -1, sizeof dp1);
return fun2(0, 0);
}
// void solve1() {
// for (int bit = 50; bit >= 0; --bit) {
// msk |= (1 << bit);
// if (!check1())
// msk ^= (1 << bit), ans |= (1 << bit);
// }
// }
void solve2() {
for (int bit = 50; bit >= 0; --bit) {
msk |= (1 << bit);
if (!check2())
msk ^= (1 << bit), ans |= (1 << bit);
}
cout << ans << endl;
}
void solve() {
cin >> N >> A >> B;
for (int i = 0; i < N; ++i)
cin >> Y[i];
// if (A == 1) {
// solve1();
// }
// else {
solve2();
// }
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
solve();
}
