#include<bits/stdc++.h>
#define int long long
using namespace std;
int ar[2005];
int mn[2005];
int inf=1e18;
int can[105][105];
int psum[2005];
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
int n,a,b;cin>>n>>a>>b;
for(int i=1;i<=n;i++)cin>>ar[i],psum[i]=ar[i]+psum[i-1];
if(a==1){
int val=0;
for(int i=40;i>=0;i--){
for(int i=1;i<=n;i++)mn[i]=inf;
for(int j=1;j<=n;j++){
int sum=0;
for(int k=j;k<=n;k++){
sum+=ar[k];
if((sum&(~val))<(1LL<<i))mn[k]=min(mn[k],mn[j-1]+1);
}
}
if(mn[n]>b)val=val|(1LL<<i);
}
cout<<val;
}else{
int val=0;
for(int i=40;i>=0;i--){
for(int i=1;i<=n;i++)for(int j=1;j<=n;j++)can[i][j]=0;
can[0][0]=1;
for(int j=1;j<=n;j++){
for(int k=1;k<=j;k++){
int sum=psum[j]-psum[k-1];
for(int l=1;l<=b;l++){
if((sum&(~val))<(1LL<<i))can[j][l]|=can[k-1][l-1];
}
}
}
int rcan=0;
for(int i=a;i<=b;i++)rcan|=can[n][i];
if(!rcan)val=val|(1LL<<i);
}
cout<<val;
}
}
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