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Submission #406331

# Submission time Handle Problem Language Result Execution time Memory
406331 2021-05-17T11:43:07 Z MilosMilutinovic Exam (eJOI20_exam) C++14
0 / 100
 1000 ms 460 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 5005;

int a[N];
int b[N];
int dp[N];

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

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Incorrect 1 ms 204 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 336 KB Output is correct
2 Runtime error 2 ms 460 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1087 ms 452 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Incorrect 1 ms 204 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Incorrect 1 ms 204 KB Output isn't correct
6 Halted 0 ms 0 KB -