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Submission #440389

# Submission time Handle Problem Language Result Execution time Memory
440389 2021-07-02T08:23:37 Z prvocislo Exam (eJOI20_exam) C++17
0 / 100
 7 ms 844 KB 
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> a(n), b(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < n; i++) cin >> b[i];
    vector<vector<int> > v(n, vector<int>(2, -1));
    for (int it = 0; it < 2; it++) 
    {
        map<int, int> m;
        vector<pair<int, int>> stk; // {hodnota, index}
        for (int i = 0; i < n; i++)
        {
            while (!stk.empty() && a[i] > stk.back().first) 
                m[stk.back().first] = -1, stk.pop_back();
            stk.push_back({a[i], i}); m[a[i]] = i;
            if (m.count(b[i]) && m[b[i]] != -1)
                v[i][it] = m[b[i]];
        }
        reverse(a.begin(), a.end());
        reverse(b.begin(), b.end());
    }
    for (int i = 0; i < n / 2; i++) swap(v[i][1], v[n-i-1][1]);
    vector<int> u;
    for (int i = 0; i < n; i++)
    {
        if (v[i][1] != -1) u.push_back(v[i][1]);
        if (v[i][0] != -1 && v[i][0] != v[i][1]) u.push_back(v[i][0]);
    }
    vector<int> l;
    for (int i : u)
    {
        int id = upper_bound(l.begin(), l.end(), i) - l.begin();
        if (id == l.size()) l.push_back(i);
        else l[id] = i;
    }
    cout << l.size() << "\n";
    return 0;
}

Compilation message

exam.cpp: In function 'int main()':
exam.cpp:41:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         if (id == l.size()) l.push_back(i);
      |             ~~~^~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Incorrect 1 ms 204 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 1 ms 320 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 844 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Incorrect 1 ms 204 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Incorrect 1 ms 204 KB Output isn't correct
5 Halted 0 ms 0 KB -