Submission #961822

#	Time	Username	Problem	Language	Result	Execution time	Memory
961822		vjudge1	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	180 ms	4452 KiB

sculpture

#include<bits/stdc++.h>

using namespace std;

#define int long long

const int _N=2010;
int a[_N], n, l, r, pf[_N];

namespace sub5{
   const int N=2010;
   bool adj[N][N];
   int f[N];
   bool check(int msk){
      for (int i=0; i<=n; ++i) for (int j=i+1; j<=n; ++j) adj[i][j]=((pf[j]-pf[i])&msk)==0;
      memset(f, 0x3f, sizeof f);
      f[0]=0;
      for (int i=0; i<n; ++i) for (int j=i+1; j<=n; ++j) if (adj[i][j]){
         f[j]=min(f[j], f[i]+1);
      }
      return f[n]<=r;
   }
   void solve(){
      int msk=(1ll<<60)-1;
      for (int i=59; i>=0; --i){
         if (check((1ll<<60)-1-(msk^(1ll<<i)))) msk^=1ll<<i;
      }
      cout << msk << '\n';
   }
}

namespace sub4{
   const int N=110;
   bool adj[N][N];
   bool f[N][N];
   bool check(int msk){
      for (int i=0; i<=n; ++i) for (int j=i+1; j<=n; ++j) adj[i][j]=((pf[j]-pf[i])&msk)==0;
      memset(f, 0, sizeof f);
      f[0][0]=1;
      for (int i=0; i<n; ++i) for (int j=i+1; j<=n; ++j) if (adj[i][j]){
         for (int k=0; k<n; ++k) f[j][k+1]|=f[i][k];
      }
      return *max_element(f[n]+l, f[n]+r+1);
   }
   void solve(){
      int msk=(1ll<<60)-1;
      for (int i=59; i>=0; --i){
         if (check((1ll<<60)-1-(msk^(1ll<<i)))) msk^=1ll<<i;
      }
      cout << msk << '\n';
   }
}

int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   cin >> n >> l >> r;
   for (int i=1; i<=n; ++i) cin >> a[i];
   partial_sum(a, a+n+1, pf);
   if (l==1) sub5::solve();
   else sub4::solve();
   return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 21 / 21
• Subtask 4: 25 / 25
• Subtask 5: 29 / 29