#include <bits/stdc++.h>
using namespace std;
#define int long long
const int MAXN = 2005;
int dp[MAXN], v[MAXN];
vector<int> ban;
bool ok(int x){
for(int i = 0; i < ban.size(); i++)
if( x &(1LL<<ban[i]) )return false;
return true;
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int n,a,b; cin>>n>>a>>b;
for(int i = 1; i <= n; i++)cin>>v[i];
dp[n+1] = 0;
int ans = 0;
for(int bit = 40; bit >= 0; bit--){
ban.push_back(bit);
for(int i = n; i >= 1; i--){
dp[i] = n+1;
int sum = 0;
for(int j = i; j <= n; j++){
sum += v[j];
if(ok(sum))dp[i] = min(dp[i], dp[j+1]+1);
}
}
if(dp[1] > b){
ban.pop_back();
ans += (1LL<<bit);
}
}
cout<<ans<<"\n";
}
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