#include <bits/stdc++.h>
using namespace std;
#define SZ(v) ((int)(v).size())
using ll = long long;
const int MAXP = 60;
int nb_sculptures, min_parti, max_parti;
vector<ll> valeur;
void read_in()
{
cin >> nb_sculptures >> min_parti >> max_parti;
valeur.resize(nb_sculptures);
for (auto &v : valeur)
cin >> v;
}
void solve_a1(void)
{
ll cur_prefix=0;
ll mask=0;
auto try_prefix = [&](void)
{
vector<int> dp(nb_sculptures+1);
dp[nb_sculptures] = 0;
for (int i(nb_sculptures-1); i >= 0; --i)
{
dp[i] = 1e9;
ll sum(0);
for (int nxt(i); nxt < nb_sculptures; ++nxt)
{
sum += valeur[nxt];
if (((sum & mask) & cur_prefix) == (sum & mask))
dp[i] = min(dp[i], 1 + dp[nxt+1]);
}
}
return dp[0] <= max_parti;
};
for (ll p(MAXP-1); p >= 0; --p)
{
mask += (1LL<<p);
if (!try_prefix())
cur_prefix += (1LL<<p);
assert(try_prefix());
}
cout << cur_prefix << endl;
}
int main(void)
{
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
read_in();
solve_a1();
}
