이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fbo find_by_order
#define ook order_of_key
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<ll> vi;
typedef long double ld;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<int>::iterator sit;
typedef map<int,int>::iterator mit;
typedef vector<int>::iterator vit;
ll a[2001];
bool dp[2001][2001];
ll s[2001];
int dp2[2001];
ll sum(int l, int r)
{
if(l==0) return s[r];
return s[r]-s[l-1];
}
const int INF =1000001;
int main()
{
ios_base::sync_with_stdio(0); cin.tie(0);
ll ans = 0;
int n; cin>>n;
int l,r; cin>>l>>r;
for(int i=0;i<n;i++)
{
cin>>a[i];
s[i]=a[i];
if(i>0) s[i]+=s[i-1];
}
ll ban = (1LL<<43)-1;
for(int i = 42; i >= 0; i--)
{
if(l==1)
{
for(int i=0;i<n;i++) dp2[i]=INF;
ban^=(1LL<<i);
for(int i=0;i<n;i++)
{
ll cur=sum(0,i);
if((cur|ban)==ban)
{
dp2[i]=1;
}
}
for(int i=1;i<n;i++)
{
for(int j=0;j<i;j++)
{
ll cur=sum(j+1,i);
if((cur|ban)==ban)
{
dp2[i]=min(dp2[j]+1,dp2[i]);
}
}
//cerr<<i<<' '<<dp2[i]<<'\n';
}
if(dp2[n-1]>r)
{
ans^=(1LL<<i);
ban^=(1LL<<i);
}
}
else
{
for(int i=0;i<=n;i++)
{
for(int j=0;j<n;j++)
{
dp[i][j]=0;
}
}
ban^=(1LL<<i);
for(int i=0;i<n;i++)
{
ll cur=sum(0,i);
if((cur|ban)==ban)
{
dp[1][i]=1;
}
}
for(int i=1;i<n;i++)
{
for(int j=0;j<n;j++)
{
if(dp[i][j])
{
for(int k=j+1;k<n;k++)
{
ll cur=sum(j+1,k);
if((cur|ban)==ban)
{
dp[i+1][k]=1;
}
}
}
}
}
bool pos=0;
for(int i=l;i<=r;i++)
{
if(dp[i][n-1])
{
pos=1;
break;
}
}
if(!pos)
{
ans^=(1LL<<i);
ban^=(1LL<<i);
}
}
}
cout<<ans<<'\n';
}
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