#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N = 1e2 + 5;
const int INF = 1e18;
int a[N], dp[N][N];
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, l, r;
cin >> n >> l >> r;
for(int i = 1; i <= n; i++)
cin >> a[i];
for(int i = 0; i < N; i++)
for(int j = 0; j < N; j++)
dp[i][j] = INF;
dp[0][0] = 0;
for(int k = 1; k <= r; k++){
for(int i = 1; i <= n; i++){
int sum = 0;
for(int j = i; j >= 1; j--){
sum += a[j];
dp[i][k] = min(dp[i][k], (int)(dp[j - 1][k - 1] | sum));
}
}
}
int mn = INF;
for(int i = l; i <= r; i++)
mn = min(mn, dp[n][i]);
cout << mn << "\n";
}
/*
6 1 3
8 1 2 1 5 4
*/
