#include <bits/stdc++.h>
using namespace std;
const int N = 109;
const int MX = 1030;
const int inf = int(1e9);
int a[N];
int sum[N];
int dp[N][MX];
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, A, B;
cin >> n >> A >> B;
for (int i = 1; i <= n; i++) {
cin >> a[i];
}
for (int i = 1; i <= n; i++) {
sum[i] = sum[i - 1] + a[i];
}
for (int i = 0; i <= n; i++) {
for (int OR = 0; OR < MX; OR++) {
dp[i][OR] = inf;
}
}
dp[0][0] = 0;
for (int i = 1; i <= n; i++) {
for (int j = 0; j < i; j++) {
int s = sum[i] - sum[j];
for (int OR = 0; OR < MX; OR++) {
dp[i][OR | s] = min(dp[i][OR | s], dp[j][OR] + 1);
}
}
}
for (int OR = 0; OR < MX; OR++) {
if (A <= dp[n][OR] && dp[n][OR] <= B) {
cout << OR << '\n';
return 0;
}
}
return 0;
}
