// cre: Nguyen Ngoc Hung - Train VOI 2024 :>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <unordered_set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <cstring>
#include <unordered_map>
#include <cmath>
#include <array>
#include <cassert>
#include <random>
using namespace std;
#define SORT_UNIQUE(v) sort(ALL(v)),(v).resize(unique(ALL(v))-(v).begin())
#define __nnhzzz__ signed main()
#define BIT(i,j) ((i>>j)&1LL)
#define MASK(i) (1LL<<i)
#define RALL(x) (x).rbegin(),(x).rend()
#define ALL(x) (x).begin(),(x).end()
#define SZ(x) (int)(x).size()
#define fi first
#define se second
#define INF 0x3f3f3f3f
#define ll long long
#define ull unsigned long long
#define ld long double
#define vi vector<int>
#define vvi vector<vi>
#define vvvi vector<vvi>
#define vvvvi vector<vvvi>
#define pii pair<int,int>
#define vpii vector<pii>
#define RESET(x,val) memset((x),(val),sizeof(x))
#define REPDIS(i,be,en,j) for(int i = (be); i<=(en); i+=j)
#define REPD(i,be,en) for(int i = (be); i>=(en); i--)
#define REP(i,be,en) for(int i = (be); i<=(en); i++)
#define int ll
//-------------------------------------------------------------//
const int oo = 1e12,LOG = 20,MAXN = 2e3+7,N = 105;
const int MOD = 1e9+7,MOD1 = 1e9+207,MOD2 = 1e9+407,MOD3 = 998244353;
//-------------------------------------------------------------//
template<typename T1, typename T2> bool mini(T1 &a, T2 b){if(a>b){a=b;return true;}return false;}
template<typename T1, typename T2> bool maxi(T1 &a, T2 b){if(a<b){a=b;return true;}return false;}
template<typename T> T gcd(T a, T b) { while(b) { a %= b; swap(a,b); } return a; }
template<typename T> T lcm(T a, T b) { return a/gcd(a,b)*b; }
/*
----------------------------------------------------------------
END OF TEMPLATE
----------------------------------------------------------------
Nguyen Ngoc Hung - nnhzzz
Training for VOI24 gold medal
----------------------------------------------------------------
*/
int a[MAXN],s[MAXN];
int n,l,r;
// 100
void sub1(){
int res = oo;
REP(state,0,MASK(n)-1){
int cnt = __builtin_popcount(state)+1;
if(cnt<l || cnt>r || BIT(state,(n-1))){
continue;
}
int pre = 0,ans = 0;
REP(i,1,n){
if(BIT(state,(i-1))){
ans |= s[i]-s[pre];
pre = i;
}
}
if(pre!=n){
ans |= s[n]-s[pre];
}
mini(res,ans);
}
cout << res;
}
int dp[53][23][515];
void sub2(){
dp[0][0][0] = 1;
REP(gr,0,r-1){
REP(i,0,n){
REP(now,0,512){
if(dp[i][gr][now]==0){
continue;
}
REP(j,i+1,n){
dp[j][gr+1][now|(s[j]-s[i])] = 1;
}
}
}
}
int res = oo;
REP(gr,l,r){
REP(now,0,512){
if(dp[n][gr][now]==1){
mini(res,now);
}
}
}
cout << res;
}
int dp1[MAXN],dp2[N][N];
bool check1(int x){
REP(i,1,n){
dp1[i] = oo;
}
dp1[0] = 0;
REP(i,0,n){
if(dp1[i]==oo){
continue;
}
REP(j,i+1,n){
if(((s[j]-s[i])|x)==x){
mini(dp1[j],dp1[i]+1);
}
}
}
return (dp1[n]<=r);
}
bool check2(int x){
REP(i,0,n){
REP(j,0,n){
dp2[i][j] = 0;
}
}
dp2[0][0] = 1;
REP(i,0,n-1){
REP(j,0,i){
if(dp2[i][j]==0){
continue;
}
REP(k,i+1,n){
if(((s[k]-s[i])|x)==x){
dp2[k][j+1] = 1;
}
}
}
}
REP(i,l,r){
if(dp2[n][i]==1){
return true;
}
}
return false;
}
void sub(){
int state = 0,res = 0;
REPD(i,40,0){
if(l==1){
res = res+1LL*MASK(i)*(!check1(res+MASK(i)-1));
}else{
res = res+1LL*MASK(i)*(!check2(res+MASK(i)-1));
}
}
cout << res;
}
void solve(){
cin >> n >> l >> r;
int ma = 0;
REP(i,1,n){
cin >> a[i];
s[i] = s[i-1]+a[i];
maxi(ma,a[i]);
}
// sub(); return ;
if(n<=20){
sub1(); return ;
}
if(n<=50 && r<=20 && ma<=10){
sub2(); return ;
}
sub();
}
__nnhzzz__{
ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
#define name "test"
if(fopen(name".inp","r")){
freopen(name".inp","r",stdin);
freopen(name".out","w",stdout);
}
#define name1 "nnhzzz"
if(fopen(name1".inp","r")){
freopen(name1".inp","r",stdin);
freopen(name1".out","w",stdout);
}
int test = 1;
while(test--){
solve();
}
cerr << "\nTime elapsed: " << 1000*clock()/CLOCKS_PER_SEC << "ms\n";
return 0;
}
