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 <iostream>
#include <set>
#include <algorithm>
#include <vector>
using namespace std;
#define ll long long
const ll inf=1e18;
const ll N=2002;
ll pre[N];
ll pw2[50];
ll posa[N];
int main()
{
int n,a,b;
cin>>n>>a>>b;
pw2[0]=1;
for(int i=1;i<50;i++)
pw2[i]=(2ll*pw2[i-1]);
for(int i=0;i<n;i++)
{
cin>>pre[i+1];
pre[i+1]+=pre[i];
}
ll pos=pw2[49]-1;
for(int i=48;i>=0;i--)
{
ll new_pos=pos-pw2[i];
posa[0]=0;
bool pos1=0;
for(int i=1;i<=n;i++)
{
posa[i]=1e9;
for(int k=0;k<i;k++)
{
ll np=(pre[i]-pre[k]);
ll cur_or=(np|new_pos);
if(cur_or==new_pos)
posa[i]=min(posa[i],posa[k]+1);
}
if(i==n and posa[i]<=b)
{
pos1=1;
}
}
if(pos1)
pos=new_pos;
}
cout<<pos<<'\n';
return 0;
}
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