Submission #151048

#	Time	Username	Problem	Language	Result	Execution time	Memory
151048		AlexPop28	Bali Sculptures (APIO15_sculpture)	C++11	100 / 100	94 ms	504 KiB

sculpture

#include <bits/stdc++.h>
using namespace std;

const long long INF_LL = (1LL << 41) - 1;

bool Solve(int n, int a, int b, long long mask, const vector<int> &v) {
  vector<vector<int>> dp(n + 1, vector<int>(b + 1));
  dp[0][0] = 1;
  for (int i = 1; i <= n; ++i) {
    for (int j = 1; j <= b; ++j) {
      long long sum = 0LL;
      for (int k = i; k >= 1; --k) {
        sum += v[k];
        dp[i][j] |= dp[k - 1][j - 1] & ((sum | mask) == mask);
      }
    }
  }
  return *max_element(dp[n].begin() + a, dp[n].begin() + b + 1);
}

bool SolveA1(int n, int b, long long mask, const vector<int> &v) {
  vector<int> dp(n + 1, n + 1);
  dp[0] = 0;
  for (int i = 1; i <= n; ++i) {
    long long sum = 0LL;
    for (int j = i; j >= 1; --j) {
      sum += v[j];
      if ((sum | mask) == mask)
        dp[i] = min(dp[i], dp[j - 1] + 1);
    } 
  }
  return dp[n] <= b;
}

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);

  int n, a, b; cin >> n >> a >> b;
  vector<int> v(n + 1);
  for (int i = 1; i <= n; ++i)
    cin >> v[i];
  auto Check = [&](long long mask) {
    return a == 1 ? SolveA1(n, b, mask, v) : Solve(n, a, b, mask, v);
  };
  long long ans = INF_LL;
  for (int bit = 40; bit >= 0; --bit) {
    if (Check(ans ^ (1LL << bit)))
      ans ^= 1LL << bit;
  }
  cout << ans << endl;
}

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