#include<bits/stdc++.h>
using namespace std;
const int mxn = 2002;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
long long n,a,b;cin>>n>>a>>b;
vector<long long>arr(n);
for (long long i = 0;i<n;++i){
cin>>arr[i];
}
vector<long long>pref(n + 1,0);
for (int i = 0;i<n;++i){
pref[i + 1] = pref[i] + arr[i];
}
auto query = [&](int u,int v){
return pref[v + 1] - pref[u];
};
auto check = [&](long long v){
bitset<mxn>dp[mxn + 1];
dp[0][0] = 1;
for (int i = 0;i<n;++i){
bitset<mxn>cur;
for (int j = 0;j<=n;++j){
if (dp[i][j] == 1){
cur[j + 1] = 1;
}
}
for (int x = i;x<n;++x){
if (query(i,x) & v){
continue;
}
dp[x + 1] = (dp[x + 1] | cur);
}
}
for (int i = a;i<=b;++i){
if (dp[n][i])return 1;
}
return 0;
};
long long cur = 0;
long long ans = 0;
for (long long i = 43;i>=0;--i){
if (check((cur ^ (1LL<<i)))){
cur ^= (1LL<<i);
}
else{
ans ^= (1LL<<i);
}
}
cout<<ans<<'\n';
return 0;
}
