Submission #1130723

#	Time	Username	Problem	Language	Result	Execution time	Memory
1130723		Hamed_Ghaffari	Bali Sculptures (APIO15_sculpture)	C++20	100 / 100	46 ms	332 KiB

sculpture

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,sse4,sse4.2,lzcnt,popcnt")

using ll = long long;

const int INF = 1e9;
const int MXN = 2002;
const int LOG = 41;

int n, A, B;
ll ps[MXN];

namespace n2log {
  int dis[MXN];
  ll val;
  bool check() {
    fill(dis+1, dis+n+1, INF);
    for(int i=0; i<n; i++)
      for(int j=i+1; j<=n; j++)
        if(!((ps[j]-ps[i])&val))
          dis[j] = min(dis[j], dis[i]+1);
    return dis[n]<=B;
  }
  void solve() {
    ll ans=0;
    for(int i=LOG-1; i>=0; i--) {
      val ^= 1ll<<i;
      if(!check())
        val ^= 1ll<<i,
        ans ^= 1ll<<i;
    }
    cout << ans << '\n';
  }
}

namespace n3log {
  const int MXN = 102;
  const int LOG = 37;
  bool dp[MXN][MXN];
  ll val;
  bool check() {
    memset(dp, 0, sizeof(dp));
    dp[0][0] = 1;
    for(int i=0; i<n; i++)
      for(int x=0; x<B; x++)
        if(dp[i][x])
          for(int j=i+1; j<=n; j++)
            if(!((ps[j]-ps[i])&val))
              dp[j][x+1] = 1;
    for(int x=A; x<=B; x++)
      if(dp[n][x])
        return 1;
    return 0;
  }
  void solve() {
    ll ans=0;
    for(int i=LOG-1; i>=0; i--) {
      val ^= 1ll<<i;
      if(!check())
        val ^= 1ll<<i,
        ans ^= 1ll<<i;
    }
    cout << ans << '\n';
  }
}

int32_t main() {
  cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
  cin >> n >> A >> B;
  for(int i=1; i<=n; i++) {
    cin >> ps[i];
    ps[i] += ps[i-1];
  }
  if(A==1) n2log::solve();
  else n3log::solve();
  return 0;
}

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