#include "bits/stdc++.h"
#define FOR(i,a,b)for(int i=(a);i<(b);i++)
#define F0R(i,a)FOR(i,0,a)
#define ROF(i,a,b)for(int i=(b)-1;i>=(a);i--)
#define R0F(i,a)ROF(i,0,a)
#define REP(a)F0R(_,a)
using namespace std;
#define int long long
const int mxl=45;
signed main(){
cin.tie(nullptr)->sync_with_stdio(false);
int n,a,b;cin>>n>>a>>b;
vector<int>y(n+2);
FOR(i,1,n+1)cin>>y[i];
long long msk=(1ll<<mxl)-1;
if(a==1)R0F(i,mxl){
vector<int>dp(n+1,n+1);
dp[0]=0,msk^=1ll<<i;
for(int j=1,s=y[j];j<=n;s=y[++j])
for(int k=j;k>=1;s+=y[--k])
if(dp[k-1]<b and (s&msk)==s)dp[j]=min(dp[j],dp[k-1]+1);
if(dp[n]>b)msk^=1ll<<i;
}else R0F(i,mxl){
vector<vector<bool>>dp(n+1,vector<bool>(n+1,false));
dp[0][0]=true,msk^=1ll<<i;
for(int j=1,s=y[j];j<=n;s=y[++j])
for(int k=j;k>=1;s+=y[--k])FOR(l,1,k+1)
dp[j][l]=dp[j][l] or (dp[k-1][l-1] and (s&msk)==s);
bool f=false;FOR(j,a,b+1)f|=dp[n][j];
if(not f)msk^=1ll<<i;
}
cout<<msk<<'\n';
}
