#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#ifdef TEST
#define getchar_unlocked _getchar_nolock
#endif
#define int long long
#define ins insert
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define pf push_front
#define pp pop
#define ppb pop_back
#define ppf pop_front
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef double db;
typedef long long ll;
typedef pair<int, int> ii;
typedef tuple<int, int, int> iii;
typedef tree<pair<int, int>, null_type, less<pair<int, int> >, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
typedef tree<pair<int, int>, null_type, less<pair<int, int> >, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
int ans, N, A, B, Y[2005], P[2005], dp2[2005];
char mem[2005][2005];
vector<int> S;
bool dp(int n, int x) {
if (x < 0) return 0;
if (n == 0) return x == 0;
if (mem[n][x] != -1) return mem[n][x];
bool r = 0;
for (int i = 0; i < n; i++) {
bool inv = 0;
for (int j : S)
if ((P[n] - P[i]) & (1ll << j)) {
inv = 1;
break;
}
if (!inv) r |= dp(i, x - 1);
}
return mem[n][x] = r;
}
main() {
ios::sync_with_stdio(0);
cin.tie(0);
cin >> N >> A >> B;
if (N > 100) assert(A == 1);
for (int i = 1; i <= N; i++) cin >> Y[i], P[i] = Y[i] + P[i - 1];
for (int i = 41; i >= 0; i--) {
S.pb(i);
bool yes = 0;
if (A > 1) {
for (int i = 1; i <= N; i++)
for (int j = 1; j <= B; j++)
mem[i][j] = -1;
for (int j = A; j <= B; j++)
if (dp(N, j)) {
yes = 1;
break;
}
} else {
for (int j = 1; j <= N; j++) {
dp2[j] = 1e9;
for (int k = 0; k < j; k++) {
bool inv = 0;
for (int l : S)
if ((P[j] - P[k]) & (1ll << l)) {
inv = 1;
break;
}
if (!inv) dp2[j] = min(dp2[j], dp2[k] + 1);
}
}
yes = dp2[N] <= B;
}
if (!yes) S.ppb(), ans |= (1ll << i);
}
cout << ans << '\n';
}
