Submission #864304

#	Time	Username	Problem	Language	Result	Execution time	Memory
864304		vjudge1	Financial Report (JOI21_financial)	C++17	45 / 100	4072 ms	450168 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int n, p;
vector<int> wl, wr;
vector<vector<int> > dp;
void upd(int j, int i, int x)
{
    dp[i][j] = x;
    while (i > 1)
    {
        dp[i >> 1][j] = min(dp[i][j], dp[i ^ 1][j]);
        i >>= 1;
    }
    return;
}
int qmin(int j, int l, int r)
{
    int an = 1000000001;
    while (l < r)
    {
        if (l & 1)
        {
            an = min(an, dp[l][j]);
            l++;
        }
        l >>= 1;
        if (r & 1)
        {
            r--;
            an = min(an, dp[r][j]);
        }
        r >>= 1;
    }
    return an;
}
int main()
{
    int d, i;
    cin >> n >> d;
    vector<int> v(n);
    for (i = 0; i < n; i++)
        cin >> v[i];
    if (n < 7001)
    {
        int j, k, m = 0;
        p = n;
        while (p != (p & -p))
            p++;
        dp.resize(2 * p);
        wl.resize(2 * p);
        wr.resize(2 * p);
        for (i = p; i < 2 * p; i++)
        {
            dp[i].resize(n);
            for (j = 0; j < n; j++)
                dp[i][j] = 1000000001;
            wl[i] = i;
            wr[i] = i + 1;
        }
        for (i = p - 1; i >= 0; i--)
        {
            dp[i].resize(n);
            for (j = 0; j < n; j++)
                dp[i][j] = 1000000001;
            wl[i] = wl[2 * i];
            wr[i] = wr[2 * i + 1];
        }
        for (i = p; i < p + n; i++)
        {
            for (j = 0; j < n; j++)
            {
                if (j)
                {
                    upd(j, i, 1000000001);
                    k = qmin(j, max(p, i - d), i);
                    upd(j, i, min(dp[i][j], k));
                    k = qmin(j - 1, max(p, i - d), i);
                    if (k < v[i - p])
                        upd(j, i, min(dp[i][j], k));
                }
                else
                    upd(j, i, v[i - p]);
                upd(j, i, max(dp[i][j], v[i - p]));
                if (i == p + 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:104:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |             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