Submission #1128004

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128004		VinhLuu	Bali Sculptures (APIO15_sculpture)	C++17	50 / 100	82 ms	480 KiB

sculpture

#include <bits/stdc++.h>
#define ll long long
#define all(lpv) lpv.begin(), lpv.end()
#define pot(x, y) lower_bound(x.begin(), x.end(), y) - x.begin() + 1
using namespace std;

#define lpv

#ifndef lpv
#include "AC.h"
#endif // lpv

//#define int long long

const int N = 2e3 + 5;

int n, a[N], L, R;
ll s[N];

namespace sub4 {
  bool f[N][N];
  void solve() {
    ll ret = 0, kq = 0;
    for(int bit = 36; bit >= 0; bit --) {
      for(int i = 0; i <= n; i ++) {
        for(int j = 0; j <= i; j ++) f[i][j] = 0;
      }
      f[0][0] = 1;
      for(int i = 1; i <= n; i ++) for(int j = 1; j <= i; j ++) {
        for(int pos = i - 1; pos >= j - 1; pos --) {
          if(!((s[i] - s[j]) & (ret + (1ll << bit))))
            f[i][j] = max(f[i][j], f[pos][j - 1]);
        }
      }
      bool ff = true;
      for(int i = L; i <= R; i ++) if(f[n][i]) {
        ff = false;
        break;
      }
      if(!ff) ret += (1ll << bit);
      else kq += (1ll << bit);
    }
    cout << kq;
  }
}

namespace sub5 {
  int f[N];
  const int oo = 1e9;
  void solve() {
    ll ret = 0, kq = 0;
    for(int bit = 40; bit >= 0; bit --) {
      for(int i = 0; i <= n; i ++) f[i] = n + 1;
      f[0] = 0;
      for(int i = 1; i <= n; i ++) {
        for(int j = i - 1; j >= 0; j --) {
          if(!((s[i] - s[j]) & (ret + (1ll << bit))))
            f[i] = min(f[i], f[j] + 1);
        }
      }
      if(f[n] <= R) ret += (1ll << bit);
      else kq += (1ll << bit);
    }
    cout << kq << "\n";
  }
}

#ifdef lpv
signed main() {
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  #define task "v"
  if(fopen(task ".inp","r")) {
    freopen(task ".inp","r",stdin);
    freopen(task ".out","w",stdout);
  }

  cin >> n >> L >> R;
  for(int i = 1; i <= n; i ++) {
    cin >> a[i];
    s[i] = s[i - 1] + a[i];
  }
  if(n <= 100 && L > 1) sub4 :: solve();
  else
    sub5 :: solve();
}
#endif // lpv

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:74:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   74 |     freopen(task ".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:75:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |     freopen(task ".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 21 / 21
• Subtask 4: 0 / 25
• Subtask 5: 29 / 29