Submission #419839

#	Time	Username	Problem	Language	Result	Execution time	Memory
419839		schse	Financial Report (JOI21_financial)	C++17	28 / 100	718 ms	4176 KiB

Main

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

int N, D;
vector<int> arr;
map<int, int> dp[500];

int rec(int n, int cmax = -1)
{
    int score = arr[n] > cmax ? 1 : 0;
    int tmp = 0;
    int cmal = cmax;

    if (dp[n].count(cmax))
        return dp[n][cmax];

    if (n == N - 1)
        return dp[n][cmax] = score;

    cmax = max(cmax, arr[n]);
    for (int i = 1; i <= D && i + n <= N - 1; i++)
        tmp = max(tmp, rec(n + i, cmax));
    return dp[n][cmal] = score + tmp;
}

int main()
{
    cin >> N >> D;
    arr.resize(N);
    for (int &i : arr)
        cin >> i;

    assert(N <= 400);
    //compression

    {
        vector<int> arr2 = arr;
        sort(arr2.begin(), arr2.end());
        map<int, int> copr;
        int c = 1;
        copr[arr2[0]] = ++c;
        for (int i = 1; i < N; i++)
            if (arr2[i - 1] < arr2[i])
                copr[arr2[i]] = ++c;
        for (int &i : arr)
            i = copr[i];
    }

    int score = 0;
    for (int i = 0; i < N; i++)
        score = max(score, rec(i));
    cout << score;
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 12
• Subtask 5: 0 / 5
• Subtask 6: 0 / 35