/*input
6 1 3
8 1 2 1 5 4
*/
#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
//using namespace __gnu_pbds;
//typedef tree<pair<int,int>, null_type, less<pair<int,int>>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#pragma GCC optimize("unroll-loops,no-stack-protector")
//order_of_key #of elements less than x
// find_by_order kth element
typedef long long int ll;
#define ld double
#define pii pair<int,int>
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
const ll maxn=2e3+5;
const ll maxlg=__lg(maxn)+2;
const ll INF64=4e18;
const int INF=0x3f3f3f3f;
const ll MOD=998244353;
const ld PI=3.14159265358979323846;
const ld eps=1e-9;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define GET_POS(c,x) (lower_bound(c.begin(),c.end(),x)-c.begin())
#define MP make_pair
ll mult(ll a,ll b){
a%=MOD;
b%=MOD;
return (a*b)%MOD;
}
ll mypow(ll a,ll b){
ll res=1LL;
while(b){
if(b&1) res=mult(res,a);
a=mult(a,a);
b>>=1;
}
return res;
}
int arr[maxn];
int dp[maxn];
int dp2[maxn][maxn];
int main(){
ios::sync_with_stdio(false),cin.tie(0);
int n,a,b;
cin>>n>>a>>b;
REP1(i,n){
cin>>arr[i];
}
ll ans=(1LL<<45)-1;
if(a==1){
for(int x=44;x>=0;x--){
ans^=(1LL<<x);
//cout<<ans<<'\n';
REP1(i,n){
dp[i]=INF;
ll sum=arr[i];
for(int j=i-1;j>=0;j--){
if((sum|ans)==ans){
MNTO(dp[i],dp[j]+1);
}
sum+=arr[j];
}
}
//cout<<dp[n]<<'\n';
if(dp[n]>b){
ans^=(1LL<<x);
}
}
}
else{
for(int x=44;x>=0;x--){
ans^=(1LL<<x);
dp2[0][0]=1;
REP1(i,n){
REP1(j,n){
dp2[i][j]=0;
ll sum=arr[i];
for(int k=i-1;k>=0;k--){
if((sum|ans)==ans) dp2[i][j]|=dp2[k][j-1];
sum+=arr[k];
}
}
}
bool ok=0;
for(int j=a;j<=b;j++) if(dp2[n][j]) ok=1;
if(!ok) ans^=(1LL<<x);
}
}
cout<<ans;
}
