This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int N = 2e3 + 5;
int n, u, v;
int a[N];
ll pre[N];
bool ck(ll a, ll b, ll c){
    return (a | b) < (b | c);
}
namespace sub1{
    int dp[N];
    void solve(){
        ll ans = 0;
        for (ll i = 45; i >= 0; -- i){
            ll cur = (1 << i);
            for (int j = 1; j <= n; ++ j){
                dp[j] = n + 1;
                for (int k = j - 1; k >= 0; -- k){
                    if (ck(pre[j] - pre[k], ans, cur)) dp[j] = min(dp[j], dp[k] + 1);
                }
            }
            if (dp[n] > v) ans += cur;
        }
        cout << ans;
    }
}
namespace sub2{
    void solve(){
    }
}
void solve(){
    cin >> n >> u >> v;
    for (int i = 1; i <= n; ++ i) cin >> a[i], pre[i] = pre[i - 1] + a[i];
    if (u == 1) sub1::solve();
    else sub2::solve();
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    solve();
    return 0;
}
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