#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second
const int lg = 300;
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, l, r; cin>>n>>l>>r;
vector<int> a(n + 1);
vector<ll> p(n + 1);
for (int i = 1; i <= n; i++){
cin>>a[i];
p[i] = p[i - 1] + a[i];
}
vector<ll> dp[n + 1][r + 1]; dp[0][0] = {0};
for (int i = 1; i <= n; i++){
for (int j = 1; j <= r; j++){
for (int t = 1; t <= i; t++){
ll s = p[i] - p[t - 1];
for (ll x: dp[t - 1][j - 1]){
dp[i][j].pb(x | s);
}
}
sort(dp[i][j].begin(), dp[i][j].end());
while (dp[i][j].size() > lg){
dp[i][j].pop_back();
}
}
}
ll out = 1e18;
for (int i = l; i <= r; i++){
out = min(out, dp[n][i][0]);
}
cout<<out<<"\n";
}
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