Submission #776044

#	Time	Username	Problem	Language	Result	Execution time	Memory
776044		Sharky	Sequence (APIO23_sequence)	C++17	11 / 100	2063 ms	9744 KiB

sequence

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

#define DEBUG if (1)

int sequence(int N, std::vector<int> A) {
    int ans = 0;
    for (int i = 0; i < N; i++) {
        priority_queue<int> a;
        priority_queue<int, vector<int>, greater<int>> b;
        vector<int> cnt(N + 1, 0);
        for (int j = i; j < N; j++) {
            if (a.empty() && b.empty()) a.push(A[j]);
            else if (a.empty() || (a.size() <= b.size())) {
                if (A[j] <= b.top()) a.push(A[j]);
                else {
                    a.push(b.top());
                    b.pop();
                    b.push(A[j]);
                }
            } else if (b.empty() || (a.size() > b.size())) {
                if (A[j] >= a.top()) b.push(A[j]);
                else {
                    b.push(a.top());
                    a.pop();
                    a.push(A[j]);
                }
            } else assert(false);
            vector<int> median;
            if (a.empty()) median = {b.top()};
            else if (b.empty()) median = {a.top()};
            else median = {a.top(), b.top()};
            cnt[A[j]]++;
            for (int& med : median) ans = max(ans, cnt[med]);
        }
    }
    return ans;
}

• 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