Submission #406333

#	Time	Username	Problem	Language	Result	Execution time	Memory
406333		MilosMilutinovic	Exam (eJOI20_exam)	C++14	0 / 100	6 ms	588 KiB

exam

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  vector<int> b(n);
  for (int i = 0; i < n; i++) {
    cin >> b[i];
  }
  if (n <= 5000) {
    vector<int> dp(n);
    for (int i = 0; i < n; i++) {
      int mx = 0;
      map<int, int> cnt;
      for (int j = i; j >= 0; j--) {
        mx = max(mx, a[j]);
        cnt[b[j]]++;
        dp[i] = max(dp[i], (j == 0 ? 0 : dp[j - 1]) + cnt[mx]);
      }
    }
    int ans = *max_element(dp.begin(), dp.end());
    cout << ans << '\n';
    return 0;
  }
  return 0;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22