#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) (int)(a.size())
#define all(a) a.begin(),a.end()
#define lb lower_bound
#define ub upper_bound
#define owo ios_base::sync_with_stdio(0);cin.tie(0);
#define MOD (ll)(998244353)
#define INF (ll)(1e18)
#define debug(...) fprintf(stderr, __VA_ARGS__),fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false);\
debug("%s time : %.4fs\n", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))
typedef long long int ll;
typedef long double ld;
typedef pair<ll,ll> PII;
typedef pair<int,int> pii;
typedef vector<vector<int>> vii;
typedef vector<vector<ll>> VII;
ll gcd(ll a,ll b){if(!b)return a;else return gcd(b,a%b);}
int n,a,b;
bool dp[2001][2001];
ll d[2001];
bool can(ll mask){
for(int i=0;i<=n;i++)
for(int j=0;j<=b;j++)
dp[i][j] = 0;
dp[0][0] = 1;
for(int i=0;i<=n;i++){
for(int j=0;j<b;j++){
if(!dp[i][j])continue;
ll sum = 0;
for(int k=i+1;k<=n;k++){
sum+=d[k];
if((sum & mask) == 0)dp[k][j+1] = 1;
}
}
}
for(int i=a;i<=b;i++)
if(dp[n][i])return true;
return false;
}
int main()
{
cin>>n>>a>>b;
for(int i=1;i<=n;i++)cin>>d[i];
ll mask = 0;
for(ll i=60;i>=0;i--){
if(can(mask | (1LL<<i))){
mask|=(1LL<<i);
}
}
cout<<(mask^((1LL<<61) - 1));
}
/*
6 1 3
8 1 2 1 5 4
*/
