#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define ll long long
#define str string
#define pb push_back
#define pf push_front
#define in insert
#define all(v) v.begin(),v.end()
const int sz=1000000,INF=1000000000;
using namespace std;
vector<ll>pow2;
void solve()
{
ll n,m,l,num,cnt,res,sum,ans=INF;
cin>>n>>m>>l;
vector<ll>nums;
vector<bool>isGood(n+1);
for(int i=0;i<n;i++)
{
cin>>num;
nums.pb(num);
}
for(int i=1;i<pow2[n];i++)
{
fill(all(isGood),false),cnt=0;
for(int j=0;j<n-1;j++)
{
if(i&pow2[j])
{
cnt++,isGood[j]=true;
}
}
if(cnt>=m-1 && cnt<=l-1)
{
res=0,sum=0;
for(int j=0;j<nums.size();j++)
{
sum+=nums[j];
if(isGood[j])
{
res|=sum,sum=0;
}
}
res|=sum;
ans=min(ans,res);
}
}
cout<<ans;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr),cout.tie(nullptr);
for(int i=1;i<INF;i*=2)
{
pow2.pb(i);
}
ll t=1;
//cin>>t;
while(t--)
{
solve();
}
}
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