#include <bits/stdc++.h>
#define ll long long
#define all(x) x.begin(), x.end()
#define pb push_back
using namespace std;
const ll inf = 1e10;
void sl(){
ll n, a, b; cin >> n >> a >> b;
ll bt = 45; ll curr = (1ll << bt) - 1;
//if(a);
vector<ll>v(n), pref(n + 1, 0);
for(ll i = 0; i < n; i++){
cin >> v[i];
pref[i + 1] = pref[i] + v[i];
}
while(--bt >= 0){
vector<ll>dp(n + 1, inf);
ll temp = curr ^ (1ll << bt); dp[0] = 0;
for(ll i = 1; i <= n; i++){
for(ll j = 0; j < i; j++){
ll ok = ((pref[i] - pref[j]) & (~temp));
if(!ok)
dp[i] = min(dp[i], dp[j] + 1);
}
}
//cout << dp[n][0] << ' ' << dp[n][1] << endl;
if(dp[n] <= b) curr = temp;
}
cout << curr << endl;
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
ll t = 1; //cin >> t;
while(t--) sl();
}
