oj.uz

Submission #946343

# Submission time Handle Problem Language Result Execution time Memory
946343 2024-03-14T14:05:31 Z Nhoksocqt1 Sequence (APIO23_sequence) C++17
28 / 100
 2000 ms 34896 KB 
#ifndef Nhoksocqt1
    #include "sequence.h"
#endif // Nhoksocqt1
#include<bits/stdc++.h>
using namespace std;

#define inf 0x3f3f3f3f
#define sz(x) int((x).size())
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

template<class X, class Y>
	inline bool maximize(X &x, const Y &y) {return (x < y ? x = y, 1 : 0);}
template<class X, class Y>
	inline bool minimize(X &x, const Y &y) {return (x > y ? x = y, 1 : 0);}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

const int MAXN = 500005;

int val[MAXN], cnt[MAXN], nArr;

int sub2(void) {
    int res(1);
    for (int l = 1; l <= nArr; ++l) {
        set<int> Set;
        int pos(val[l]), cntPos(1);
        Set.insert(pos);
        ++cnt[pos];

        for (int r = l + 1; r <= nArr; ++r) {
            cntPos += (val[r] <= pos);
            if(++cnt[val[r]] == 1)
                Set.insert(val[r]);

            while(cntPos < (r - l + 1) / 2 + 1) {
                auto it = Set.lower_bound(pos); ++it;
                assert(it != Set.end());
                pos = *it;
                cntPos += cnt[pos];
            }

            while(cntPos - cnt[pos] >= (r - l + 1) / 2 + 1) {
                cntPos -= cnt[pos];
                auto it = Set.lower_bound(pos);
                assert(it != Set.begin()); --it;
                pos = *it;
            }

            //cout << l << ' ' << r << ' ' << pos << ' ' << cntPos << '\n';
            res = max(res, cnt[pos]);
            if((r - l + 1) % 2 == 0 && cntPos - cnt[pos] >= (r - l + 1) / 2) {
                auto it = Set.lower_bound(pos);
                assert(it != Set.begin()); --it;
                res = max(res, cnt[*it]);
            }
        }

        for (int r = l; r <= nArr; ++r)
            --cnt[val[r]];
    }

    return res;
}

int sequence(int _N, vector<int> _A) {
    nArr = _N;
    for (int i = 1; i <= nArr; ++i)
        val[i] = _A[i - 1];

    if(nArr <= 2000)
        return sub2();
}

#ifdef Nhoksocqt1

int main(void) {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);

    #define TASK "sequence"
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }

    vector<int> _A;
    int _N;
    cin >> _N;

    _A.resize(_N);
    for (int i = 0; i < _N; ++i)
        cin >> _A[i];

    int ans = sequence(_N, _A);
    cout << "ANSWER: " << ans << '\n';

    return 0;
}

#endif // Nhoksocqt1

Compilation message

sequence.cpp: In function 'int sequence(int, std::vector<int>)':
sequence.cpp:78:1: warning: control reaches end of non-void function [-Wreturn-type]
   78 | }
      | ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2492 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2492 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 206 ms 2572 KB Output is correct
14 Correct 201 ms 2572 KB Output is correct
15 Correct 21 ms 2392 KB Output is correct
16 Correct 22 ms 2396 KB Output is correct
17 Correct 9 ms 2516 KB Output is correct
18 Correct 192 ms 2396 KB Output is correct
19 Correct 171 ms 2652 KB Output is correct
20 Correct 152 ms 2396 KB Output is correct
21 Correct 177 ms 2396 KB Output is correct
22 Correct 183 ms 2640 KB Output is correct

Subtask #3
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Execution timed out 2062 ms 26388 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Execution timed out 2009 ms 9016 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 13.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2031 ms 34896 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2492 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 206 ms 2572 KB Output is correct
14 Correct 201 ms 2572 KB Output is correct
15 Correct 21 ms 2392 KB Output is correct
16 Correct 22 ms 2396 KB Output is correct
17 Correct 9 ms 2516 KB Output is correct
18 Correct 192 ms 2396 KB Output is correct
19 Correct 171 ms 2652 KB Output is correct
20 Correct 152 ms 2396 KB Output is correct
21 Correct 177 ms 2396 KB Output is correct
22 Correct 183 ms 2640 KB Output is correct
23 Execution timed out 2054 ms 5960 KB Time limit exceeded
24 Halted 0 ms 0 KB -

Subtask #7
0.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2492 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 206 ms 2572 KB Output is correct
14 Correct 201 ms 2572 KB Output is correct
15 Correct 21 ms 2392 KB Output is correct
16 Correct 22 ms 2396 KB Output is correct
17 Correct 9 ms 2516 KB Output is correct
18 Correct 192 ms 2396 KB Output is correct
19 Correct 171 ms 2652 KB Output is correct
20 Correct 152 ms 2396 KB Output is correct
21 Correct 177 ms 2396 KB Output is correct
22 Correct 183 ms 2640 KB Output is correct
23 Execution timed out 2062 ms 26388 KB Time limit exceeded
24 Halted 0 ms 0 KB -