#include "bits/stdc++.h"
#define sz(x) (int)size(x)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const char nl = '\n';
const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3f;
int32_t main() {
ios::sync_with_stdio(0), cin.tie(0);
int n, a, b; cin >> n >> a >> b;
vector<int> y(n); for (auto &x : y) cin >> x;
vector<ll> p(n); p[0] = y[0];
for (int i = 1; i < n; i++)
p[i] = p[i - 1] + y[i];
int c = *max_element(all(y)) * n;
vector dp(n, vector(b + 1, vector<bool>(c + 1)));
for (int i = 0; i < n; i++)
dp[i][1][p[i]] = true;
for (int i = 0; i < n; i++)
for (int k = 1; k < b; k++)
for (int val = 0; val <= c; val++)
for (int j = i + 1; j < n; j++)
dp[j][k + 1][val | (p[j] - p[i])] = dp[j][k + 1][val | (p[j] - p[i])] | dp[i][k][val];
int ans = INF;
for (int k = a; k <= b; k++)
for (int val = 0; val <= c; val++)
if (dp[n - 1][k][val] == true)
ans = min(ans, val);
cout << ans << nl;
return 0;
}
