#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define s second
#define f first
#define int ll
using namespace std;
const int N = 2005;
int p[N],a[N],dp[N][N];
int n,A,B;
bool check(int x,int len){
for (int i = 0; i <= n; i++)
for (int gr = 0; gr <= n; gr++)
dp[i][gr] = 0;
dp[0][0] = 1;
for (int i = 1; i <= n; i++){
for (int j = 1; j <= i; j++){
for (int gr = 1; gr <= n; gr++){
if (dp[i][gr]) continue;
if (dp[j - 1][gr - 1]){
int s = p[i] - p[j - 1];
bool c = 1;
for (int k = 40; k >= len; k--){
if ((s & (1LL<<k)) > 0 && (x & (1LL<<k)) == 0) {c=0; break;}
}
if (c) dp[i][gr] = 1;
}
}
}
}
for (int gr = A; gr <= B; gr++){
if (dp[n][gr]) return 1;
}
return 0;
}
signed main() {
ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
cin>>n>>A>>B;
for (int i = 1; i <= n; i++){
cin >> a[i];
p[i] = p[i - 1] + a[i];
}
int ans=0;
for (int b = 40; b >= 0; b--){
if (check(ans,b)) continue;
ans |= (1LL<<b);
}
cout<<ans;
}
/*
6 1 3
8 1 2 1 5 4
*/
