Submission #1356129

#	Time	Username	Problem	Language	Result	Execution time	Memory
1356129		kawhiet	Sequence (APIO23_sequence)	C++20	0 / 100	24 ms	4160 KiB

sequence

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

int sequence(int n, vector<int> a) {
  int ans = 0;
  for (int k = 1; k <= 3; k++) {
    int x = 0, y = 0, z = 0;
    for (int l = 0, r = 0; r < n; r++) {
      if (a[r] > k) {
        z++;
      } else if (a[r] == k) {
        y++;
      } else {
        x++;
      }
      while (max(x, z) > r - l + 1) {
        if (a[l] > k) {
          z--;
        } else if (a[l] == k) {
          y--;
        } else {
          x--;
        }
        l++;
      }
      ans = max(ans, y);
    }
  }
  return ans;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 17
• Subtask 3: 0 / 7
• Subtask 4: 0 / 12
• Subtask 5: 0 / 13
• Subtask 6: 0 / 22
• Subtask 7: 0 / 18