oj.uz

Submission #1070413

# Submission time Handle Problem Language Result Execution time Memory
1070413 2024-08-22T14:02:24 Z juicy Exam (eJOI20_exam) C++17
12 / 100
 15 ms 3160 KB 
#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

int main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);

    int n; cin >> n;
    vector<int> a(n), b(n);
    for (int &x : a) {
        cin >> x;
    }
    for (int &x : b) {
        cin >> x;
    }
    if (n > 5000) {
        int res = 0;
        for (int i = 0; i < n; ++i) {
            if (a[i] > b[0]) {
                continue;
            }
            int j = i - 1;
            bool flg = 0;
            while (j + 1 < n && a[j + 1] <= b[0]) {
                flg |= a[++j] == b[0];
            }
            res += flg * (j - i + 1);
            i = j;
        }
        cout << res;
        exit(0);
    }
    vector<int> comp;
    for (int i = 0; i < n; ++i) {
        comp.push_back(a[i]);
        comp.push_back(b[i]);
    }
    sort(comp.begin(), comp.end());
    comp.erase(unique(comp.begin(), comp.end()), comp.end());
    for (int i = 0; i < n; ++i) {
        a[i] = lower_bound(comp.begin(), comp.end(), a[i]) - comp.begin();
        b[i] = lower_bound(comp.begin(), comp.end(), b[i]) - comp.begin();
    }
    int m = comp.size();
    vector<int> dp(n + 1), cnt(m);
    dp[0] = 0;
    for (int i = 1; i <= n; ++i) {
        dp[i] = dp[i - 1];
        int ma = 0;
        for (int j = i - 1; j >= 0; --j) {
            ma = max(ma, a[j]);
            ++cnt[b[j]];
            dp[i] = max(dp[i], dp[j] + cnt[ma]);
        }
        for (int j = 0; j < i; ++j) {
            cnt[b[j]] = 0;
        }
    }
    cout << dp.back();
    return 0;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Incorrect 0 ms 348 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 3 ms 1000 KB Output is correct
3 Correct 9 ms 2140 KB Output is correct
4 Correct 7 ms 1628 KB Output is correct
5 Correct 14 ms 3160 KB Output is correct
6 Correct 8 ms 1628 KB Output is correct
7 Correct 8 ms 1620 KB Output is correct
8 Correct 15 ms 3032 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Incorrect 0 ms 348 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Incorrect 0 ms 348 KB Output isn't correct
6 Halted 0 ms 0 KB -