#include <bits/stdc++.h>
#define nl '\n'
#ifdef LOCAL
#include "template/debug.hpp"
#else
#define dbg(...) ;
#define timer(...) ;
#endif
const int mxN = 2005;
int N, A, B;
int Y[mxN];
int64_t P[mxN];
signed main() {
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
std::cin >> N >> A >> B;
for (int i = 1; i <= N; i++) std::cin >> Y[i], P[i] = P[i - 1] + Y[i];
int64_t ans = (1LL << 61) - 1;
auto check = [&]() -> bool {
if (A > 1) {
std::vector<std::vector<int>> dp(N + 1, std::vector<int>(N + 1));
dp[0][0] = true;
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= i; j++) {
for (int k = i; k >= j; k--) {
if ((ans | (P[i] - P[k - 1])) == ans) {
dp[i][j] |= dp[k - 1][j - 1];
}
}
}
}
for (int j = A; j <= B; j++) {
if (dp[N][j]) return true;
}
return false;
}
std::vector<int> dp(N + 1);
dp[0] = 0;
for (int i = 1; i <= N; i++) {
dp[i] = 1e9;
for (int j = i; j >= 1; j--) {
if ((ans | (P[i] - P[j - 1])) == ans) {
dp[i] = std::min(dp[i], dp[j - 1] + 1);
}
}
}
return dp[N] <= B;
};
for (int bit = 60; bit >= 0; bit--) {
ans ^= 1LL << bit;
dbg(std::bitset<60>(ans), ans);
if (!check()) {
dbg("failed bit", bit);
ans ^= 1LL << bit;
} else {
dbg("success bit", bit);
}
}
std::cout << ans << nl;
}
/*
6 1 3
8 1 2 1 5 4
*/
