#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define forinc(i,a,b) for(int i=a;i<=b;++i)
#define fordec(i,a,b) for(int i=a;i>=b;--i)
#define forv(a,b) for(auto &a:b)
#define pb push_back
#define pii pair<int,int>
#define fi first
#define se second
#define all(a) a.begin(),a.end()
#define reset(f,x) memset(f,x,sizeof(f))
#define bit(x,i) ((x>>(i-1))&1)
#define onbit(x,i) (x|(1ll<<(i-1)))
#define offbit(x,i) (x&~(1<<(i-1)))
#define read2(a,b) read(a),read(b)
#define read3(a,b,c) read(a),read(b),read(c)
const int N=2010;
int n,A,B;
ll f[N][N],F[N],a[N],s[N],kq;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
//freopen("SCULPTURE.inp","r",stdin);
//freopen("SCULPTURE.out","w",stdout);
cin>>n>>A>>B;
forinc(i,1,n) cin>>a[i],s[i]=s[i-1]+a[i];
if(n<=100)
{
ll S=0;
f[0][0]=1;
fordec(i,41,0)
{
ll tg=onbit(S,i);
forinc(i,1,n) forinc(j,1,B)
{
f[i][j]=0;
forinc(t,0,i-1) if(!(tg&(s[i]-s[t]))&&f[t][j-1]) f[i][j]=1;
}
bool ok=0;
forinc(i,A,B) if(f[n][i]) ok=1;
if(ok) S=tg;
else kq=onbit(kq,i);
}
return cout<<kq,0;
}
ll S=0;
F[0]=0;
fordec(i,41,0)
{
ll tg=onbit(S,i);
forinc(i,1,n)
{
F[i]=1e4;
forinc(j,0,i-1) if(!(tg&(s[i]-s[j]))) F[i]=min(F[i],F[j]+1);
}
if(F[n]<1e4) S=tg;
else kq=onbit(kq,i);
}
return cout<<kq,0;
}
