#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 2e3 + 5;
ll n, A, B, dp[N], a[N], dp1[105][105];
bool check1 (ll x) {
for (int i = 0; i <= n; ++i) {
for (int j = 0; j <= n; ++j) {
dp1[i][j] = 0;
}
}
dp1[0][0] = 1;
for (int i = 1; i <= n; ++i) {
for (int j = 1; j <= i; ++j) {
ll sum = 0;
for (int k = i; k > 0; k--) {
sum += a[k];
if ((sum & x) == sum) {
dp1[i][j] |= dp1[k - 1][j - 1];
}
}
}
}
for (int i = A; i <= B; ++i) {
if (dp1[n][i]) return 1;
}
return 0;
}
int main () {
// freopen ("input.txt", "r", stdin);
cin >> n >> A >> B;
for (int i = 1; i <= n; ++i) {
cin >> a[i];
}
ll x = (1LL << 42) - 1;
for (int i = 41; i >= 0; i--) {
x ^= (1LL << i);
// if (x == 15) {
// cout << " men : - > " << check1 (x) << "\n";
// return 0;
// }
if (!check1(x)) x ^= (1LL << i);
}
cout << x << "\n";
}
