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Submission #760260

# Submission time Handle Problem Language Result Execution time Memory
760260 2023-06-17T11:03:41 Z danikoynov Sequence (APIO23_sequence) C++17
28 / 100
 2000 ms 35404 KB 
#include "sequence.h"

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

const int maxn = 5e5 + 10;
vector < int > occ[maxn];
int val[maxn], pref[maxn];
int sequence(int N, vector<int> A)
{
    A.insert(A.begin(), 0);
    for (int i = 1; i <= N; i ++)
        occ[A[i]].push_back(i);

    int ans = 0;
    for (int x = 1; x <= N; x ++)
    {
        for (int i = 1; i <= N; i ++)
        {
            if (A[i] < x)
                val[i] = -1;
            else
            if (A[i] == x)
            val[i] = 0;
            else
                val[i] = 1;
            pref[i] = pref[i - 1] + val[i];
        }


        for (int i = 0; i < occ[x].size(); i ++)
        {
            for (int j = i; j < occ[x].size(); j ++)
            {
            //cout << "-----------" << endl;
            //cout << x << " " << i << " " << j << " " << ans << endl;
            ///cout << pref[r] << endl;
            int l = occ[x][i], r = occ[x][j];
            int min_lf = 1e9, max_lf = -1e9;
            int min_rf = 1e9, max_rf = -1e9;
            int d = 0;
            for (int p = l - 1; p >= 0; p --)
            {
                if (A[p] == x)
                    d ++;
                min_lf = min(min_lf, pref[p] - d);
                max_lf = max(max_lf, pref[p] + d);
            }
            d = 0;
            for (int p = r; p <= N; p ++)
            {
                if (A[p] == x && p != r)
                    d ++;
                min_rf = min(min_rf, pref[p] - d);
                max_rf = max(max_rf, pref[p] + d);
            }

            max_rf += (j - i + 1);
            min_rf -= (j - i + 1);
            //cout << min_lf << " " << max_lf << " " << min_rf << " " << max_rf << endl;
            if (max(min_rf, min_lf) <= min(max_rf, max_lf))
            {
                ///cout << x << " " << i << " " << j << endl;
                ans = max(ans, j - i + 1);
            }

            }
        }
    }
    return ans;
}

Compilation message

sequence.cpp: In function 'int sequence(int, std::vector<int>)':
sequence.cpp:31:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         for (int i = 0; i < occ[x].size(); i ++)
      |                         ~~^~~~~~~~~~~~~~~
sequence.cpp:33:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |             for (int j = i; j < occ[x].size(); j ++)
      |                             ~~^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 12060 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 6 ms 11988 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 6 ms 11988 KB Output is correct
12 Correct 6 ms 11988 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 12060 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 6 ms 11988 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 6 ms 11988 KB Output is correct
12 Correct 6 ms 11988 KB Output is correct
13 Correct 22 ms 12136 KB Output is correct
14 Correct 22 ms 12136 KB Output is correct
15 Correct 96 ms 12092 KB Output is correct
16 Correct 119 ms 11988 KB Output is correct
17 Correct 647 ms 12096 KB Output is correct
18 Correct 20 ms 12116 KB Output is correct
19 Correct 78 ms 12004 KB Output is correct
20 Correct 158 ms 12116 KB Output is correct
21 Correct 110 ms 12116 KB Output is correct
22 Correct 97 ms 12116 KB Output is correct

Subtask #3
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Execution timed out 2084 ms 29724 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12060 KB Output is correct
2 Execution timed out 2041 ms 24880 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 2065 ms 35404 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 12060 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 6 ms 11988 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 6 ms 11988 KB Output is correct
12 Correct 6 ms 11988 KB Output is correct
13 Correct 22 ms 12136 KB Output is correct
14 Correct 22 ms 12136 KB Output is correct
15 Correct 96 ms 12092 KB Output is correct
16 Correct 119 ms 11988 KB Output is correct
17 Correct 647 ms 12096 KB Output is correct
18 Correct 20 ms 12116 KB Output is correct
19 Correct 78 ms 12004 KB Output is correct
20 Correct 158 ms 12116 KB Output is correct
21 Correct 110 ms 12116 KB Output is correct
22 Correct 97 ms 12116 KB Output is correct
23 Execution timed out 2066 ms 14872 KB Time limit exceeded
24 Halted 0 ms 0 KB -

Subtask #7
0.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 12060 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 6 ms 11988 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 6 ms 11988 KB Output is correct
12 Correct 6 ms 11988 KB Output is correct
13 Correct 22 ms 12136 KB Output is correct
14 Correct 22 ms 12136 KB Output is correct
15 Correct 96 ms 12092 KB Output is correct
16 Correct 119 ms 11988 KB Output is correct
17 Correct 647 ms 12096 KB Output is correct
18 Correct 20 ms 12116 KB Output is correct
19 Correct 78 ms 12004 KB Output is correct
20 Correct 158 ms 12116 KB Output is correct
21 Correct 110 ms 12116 KB Output is correct
22 Correct 97 ms 12116 KB Output is correct
23 Execution timed out 2084 ms 29724 KB Time limit exceeded
24 Halted 0 ms 0 KB -