/// adil sultanov | vonat1us
#pragma GCC optimize("O3")
//#pragma comment(linker, "/STACK:36777216")
#include<bits/stdc++.h>
#define x first
#define y second
#define pb push_back
#define sz(x) (int) x.size()
#define all(z) (z).begin(), (z).end()
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int MOD = 1e9 + 7;
const int INF = 1e9 + 1e2;
void fin() {
#ifdef AM
freopen(".in", "r", stdin);
#endif
}
const bool flag = 0;
const int N = 2e3+10;
int a[N], n, L, R;
ll f(int i, int cnt) {
if (cnt > R) return (1ll<<45);
if (i == n-1) {
if (cnt >= L) return 0;
else return (1ll<<45);
}
ll sum = 0, res = (1ll<<45);
for (int j = i+1; j < n; ++j) {
sum += a[j];
res = min(res, (sum|(f(j, cnt+1))));
}
return res;
}
void ma1n() {
cin >> n >> L >> R;
for (int i = 0; i < n; ++i) cin >> a[i];
cout << f(-1, 0);
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(nullptr), fin();
int ts = 1;
if (flag) {
cin >> ts;
}
while (ts--) {
ma1n();
}
return 0;
}
