Submission #864267

#	Time	Username	Problem	Language	Result	Execution time	Memory
864267		vjudge1	Financial Report (JOI21_financial)	C++17	45 / 100	110 ms	7080 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n, d, i;
    cin >> n >> d;
    vector<int> v(n);
    for (i = 0; i < n; i++)
        cin >> v[i];
    if (n < 401)
    {
        int j, k, m = 0;
        vector<vector<int> > dp(n);
        for (i = 0; i < n; i++)
        {
            dp[i].resize(i + 1);
            for (j = 0; j <= i; j++)
            {
                dp[i][j] = 0;
                if (j)
                {
                    dp[i][j] = 1000000001;
                    for (k = i - 1; k >= 0 && k >= i - d; k--)
                    {
                        if (j - 1 <= k && dp[k][j - 1] < v[i])
                            dp[i][j] = min(dp[i][j], dp[k][j - 1]);
                        else if (j <= k)
                            dp[i][j] = min(dp[i][j], dp[k][j]);
                    }
                }
                dp[i][j] = max(dp[i][j], v[i]);
                if (i == n - 1 && dp[i][j] < 1000000001)
                    m = j;
            }
        }
        cout << m + 1;
    }
    else if (d == n)
    {
        vector<int> li = {v[0]};
        for (i = 1; i < n; i++)
        {
            int hi = li.size(), lo = -1, md;
            while (hi - lo > 1)
            {
                md = (hi + lo) / 2;
                if (li[md] < v[i])
                    lo = md;
                else
                    hi = md;
            }
            if (hi < li.size())
                li[hi] = v[i];
            else
                li.push_back(v[i]);
        }
        cout << li.size();
    }
    else if (d == 1)
    {
        v.push_back(1000000001);
        vector<int> ne(n + 1, n), st = {n}, ml(n + 1, 0);
        int m = 0;
        for (i = n - 1; i >= 0; i--)
        {
            while (v[i] >= v[st.back()])
                st.pop_back();
            ne[i] = st.back();
            ml[i] = ml[ne[i]] + 1;
            m = max(m, ml[i]);
            st.push_back(i);
        }
        cout << m;
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:52:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |             if (hi < li.size())
      |                 ~~~^~~~~~~~~~~

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