/**
* author: tuncypasha
* file: c.cpp
* created: 22.02.2026 10:26
**/
#include <bits/stdc++.h>
#define pasha ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define int long long
#define ff first
#define ss second
#define pb push_back
#define all(v) begin(v), end(v)
using namespace std;
// mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
constexpr int N = 1e+7 + 5, oo = 1e+16;
void _() {
int n, l, r;
cin >> n >> l >> r;
vector<int> a(n);
for (int i = 0; i < n; ++i)
cin >> a[i];
int ans = oo;
for (int mask = 0; mask < (1LL << (n - 1)); ++mask) {
int parts = __builtin_popcount(mask) + 1;
if (parts > r || parts < l)
continue;
int sum = 0, cost = 0;
for (int i = 0; i < n; ++i) {
if (mask & (1LL << i))
cost |= sum, sum = a[i];
else
sum += a[i];
}
cost |= sum;
ans = min(ans, cost);
}
cout << ans << '\n';
}
signed main() {
pasha
int t = 1;
// cin >> t;
for (int cs = 1; cs <= t; ++cs) {
_();
// cout << '\n';
}
}
