Submission #954411

#	Time	Username	Problem	Language	Result	Execution time	Memory
954411		Mher777	Sequence (APIO23_sequence)	C++17	0 / 100	2056 ms	35032 KiB

sequence

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <array>
#include <string>
#include <algorithm>
#include <cmath>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <bitset>
#include <list>
#include <iterator>
#include <numeric>
#include <complex>
#include <utility>
#include <random>
#include <cassert>
#include <fstream>
#include "sequence.h"
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
mt19937 rnd(7069);
typedef int itn;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef float fl;
typedef long double ld;
typedef tree<int, null_type, less<int>, rb_tree_tag,
    tree_order_statistics_node_update> indexed_set;
using vi = vector<int>;
using vll = vector<ll>;
using mii = map<int, int>;
using mll = map<ll, ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
#define ff first
#define ss second
#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define mpr make_pair
#define yes cout<<"Yes\n"
#define no cout<<"No\n"
#define all(x) (x).begin(), (x).end()
const int MAX = int(2e9 + 5);
const ll MAXL = ll(1e18) + 5ll;

const int N = 500005;
int a[N];
int n;

int sol1() {
    int len;
    vi cnt(n + 1);
    int ret = 0;
    for (int i = 1; i <= n; ++i) {
        indexed_set s;
        cnt.assign(n + 1, 0);
        len = 0;
        for (int j = i; j <= n; ++j) {
            ++cnt[a[j]];
            ++len;
            s.insert(a[j]);
            auto x = s.find_by_order((len - 1) / 2);
            if (cnt[*x] > ret) ret = cnt[*x];
            auto y = s.find_by_order((len - 1) / 2 + (len - 1) % 2);
            if (cnt[*y] > ret) ret = cnt[*y];
        }
    }
    return ret;
}

int sequence(int N, std::vector<int> A) {
    n = N;
    for (int i = 1; i <= n; ++i) {
        a[i] = A[i - 1];
    }
    if (n <= 2000) {
        return sol1();
    }
}

Compilation message (stderr)

sequence.cpp: In function 'int sequence(int, std::vector<int>)':
sequence.cpp:90:1: warning: control reaches end of non-void function [-Wreturn-type]
   90 | }
      | ^

• 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