Submission #1124157

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124157		VinhLuu	Sequence (APIO23_sequence)	C++20	11 / 100	2094 ms	5252 KiB

sequence

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

const int N = 2e5 + 5;

int n, a[N];

namespace sub1 {
  int solve() {
    int ans = 1;
    for(int i = 1; i <= n; i ++) {
      vector<int> vr;
      for(int j = i; j <= n; j ++) {
        vr.push_back(a[j]);
        sort(all(vr));
        if((int)vr.size() % 2) {
          int med = vr[(int)vr.size() / 2];
          int cnt = 0;
          for(auto j : vr) cnt += (j == med);
          ans = max(ans, cnt);
        } else {
          int m1 = vr[(int)vr.size() / 2 - 1];
          int m2 = vr[(int)vr.size() / 2];
          int c1 = 0, c2 = 0;
          for(auto j : vr) {
            c1 += (j == m1);
            c2 += (j == m2);
          }
          ans = max(ans, max(c1, c2));
        }
      }
    }
    return ans;
  }
}

int sequence(int _n, vector<int> A) {
  n = _n;
  for(int i = 1; i <= n; i ++) {
    a[i] = A[i - 1];
  }
  return sub1 :: solve();
  return 0;
}

//#define lpv

#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 ".ans","w",stdout);
  }

  int _n; cin >> _n;

  vector<int> A;

  for(int i = 1; i <= _n; i ++) {
    int x; cin >> x;
    A.push_back(x);
  }

  int result = sequence(_n, A);
  cout << result;

}

#endif // lpv

• Subtask 1: 11 / 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