#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define pb push_back
#define all(x) begin(x), end(x)
#define SZ(x) (int)(x).size()
#define cps(x) sort(all(x)), (x).erase(unique(all(x)), end(x))
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int n0 = 103;
int n, a, b;
ll dp[n0][n0], v[n0], p[n0];
int main() {
ios_base::sync_with_stdio(false), cin.tie(NULL);
cin >> n >> a >> b;
for (int i = 1; i <= n; i++) {
cin >> v[i];
p[i] = p[i - 1] + v[i];
}
memset(& dp, 0x3f, sizeof(dp));
ll res = dp[0][0];
dp[0][0] = 0;
for (int i = 1; i <= b; i++) {
for (int j = i; j <= n; j++) {
for (int k = j - 1; k >= 0; k--) {
dp[i][j] = min(dp[i][j], dp[i - 1][k] | (p[j] - p[k]));
}
}
}
for (int i = a; i <= b; i++)
res = min(res, dp[i][n]);
cout << res;
}
