Submission #641662

#	Time	Username	Problem	Language	Result	Execution time	Memory
641662		pls33	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	433 ms	241612 KiB

triusis

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

#pragma region dalykai
using p32 = pair<int, int>;
using p32u = pair<uint32_t, uint32_t>;
using p64 = pair<int64_t, int64_t>;
using p64u = pair<uint64_t, uint64_t>;
using vi16 = vector<int16_t>;
using vi16u = vector<uint16_t>;
using vi32 = vector<int>;
using vi32u = vector<uint32_t>;
using vi64 = vector<int64_t>;
using vi64u = vector<uint64_t>;
using vp32 = vector<p32>;
using vp32u = vector<p32u>;
using vp64 = vector<p64>;
using vp64u = vector<p64u>;
using vvi32 = vector<vi32>;
using vvi32u = vector<vi32u>;
using vvi64 = vector<vi64>;
using vvi64u = vector<vi64u>;
using vvp32 = vector<vp32>;
using vvp32u = vector<vp32u>;
using vvp64 = vector<vp64>;
using vvp64u = vector<vp64u>;

using pf32 = pair<float, float>;
using pf64 = pair<double, double>;
using pf80 = pair<long double, long double>;
using vf32 = vector<float>;
using vf64 = vector<double>;
using vf80 = vector<long double>;
using vpf32 = vector<pf32>;
using vpf64 = vector<pf64>;
using vpf80 = vector<pf80>;
using vvf32 = vector<vf32>;
using vvf64 = vector<vf64>;
using vvf80 = vector<vf80>;
using vvpf32 = vector<vpf32>;
using vvpf64 = vector<vpf64>;
using vvpf80 = vector<vpf80>;

template <typename key, typename val>
using ord_map = tree<key, val, less<key>, rb_tree_tag,
                     tree_order_statistics_node_update>;

template <typename key>
using ord_set = tree<key, null_type, less<key>, rb_tree_tag,
                     tree_order_statistics_node_update>;

const int BUF_SZ = 1 << 15;
inline namespace fast_in
{
    char buf[BUF_SZ];
    int pos;
    int len;

    char next_char(FILE *f)
    {
        if (pos == len)
        {
            pos = 0;
            len = (int)fread(buf, 1, BUF_SZ, f);

            if (!len)
            {
                return EOF;
            }
        }

        return buf[pos++];
    }

    int read_int(FILE *f)
    {
        int x;
        char ch;
        int sgn = 1;

        while (!isdigit(ch = next_char(f)))
        {
            if (ch == '-')
            {
                sgn *= -1;
            }
        }

        x = ch - '0';
        while (isdigit(ch = next_char(f)))
        {
            x = x * 10 + (ch - '0');
        }

        return x * sgn;
    }
}

/**
 * @brief gale programos flush_out kviest!!
 */
inline namespace fast_out
{
    char buf[BUF_SZ];
    int pos;

    void flush_out(FILE *f)
    {
        fwrite(buf, 1, pos, f);
        pos = 0;
    }

    void write_char(char c, FILE *f)
    {
        if (pos == BUF_SZ)
        {
            flush_out(f);
        }

        buf[pos++] = c;
    }

    void write_int(int x, FILE *f)
    {
        static char num_buf[100];

        if (x < 0)
        {
            write_char('-', f);
            x *= -1;
        }

        int len = 0;
        for (; x >= 10; x /= 10)
        {
            num_buf[len++] = (char)('0' + (x % 10));
        }

        write_char((char)('0' + x), f);
        while (len)
        {
            write_char(num_buf[--len], f);
        }
        write_char('\n', f);
    }
}
#pragma endregion

struct node_t
{
    int value;
    node_t *left;
    node_t *right;

    p64 range;

    node_t(int v, p64 r)
    {
        value = v;
        range = r;

        left = nullptr;
        right = nullptr;
    }

    void expand()
    {
        if (range.second - range.first == 1)
        {
            return;
        }

        int64_t mid = (range.first + range.second) / 2;
        if (!left)
        {
            left = new node_t(0, {range.first, mid});
        }
        if (!right)
        {
            right = new node_t(0, {mid, range.second});
        }
    }

    void recalc()
    {
        expand();
        value = max(left->value, right->value);
    }
};

int intersect(p64 a, p64 b)
{
    if (a.first >= b.second || a.second <= b.first)
    {
        return 0;
    }
    if (a.first >= b.first && a.second <= b.second)
    {
        return 1;
    }

    return 2;
}

void update(int value, p64 dest, node_t *node)
{
    if (!node || !intersect(node->range, dest))
    {
        return;
    }

    p64 &range = node->range;
    if (range == dest)
    {
        node->value = max(node->value, value);
        return;
    }

    node->expand();

    update(value, dest, node->left);
    update(value, dest, node->right);

    node->recalc();
}

int query(p64 dest, node_t *node)
{
    if (!node)
    {
        return 0;
    }

    p64 &range = node->range;

    int res = intersect(range, dest);
    if (!res)
    {
        return 0;
    }

    if (res == 1)
    {
        return node->value;
    }

    node->expand();

    int left = query(dest, node->left);
    int right = query(dest, node->right);

    return max(left, right);
}

int main()
{
#ifndef _AAAAAAAAA
    ios_base::sync_with_stdio(false);
    cin.tie(0);
#else
    freopen("triusis.in", "r", stdin);
#ifndef __linux__
    atexit([]()
           {
        freopen("con", "r", stdin);
        system("pause"); });
#endif
#endif

    int64_t n, m;
    cin >> n >> m;

    vi64 height(n);

    for (auto &h : height)
    {
        cin >> h;
    }

    int64_t lower = -1e9;
    int64_t upper = 1e9 + 1;

    node_t *node = new node_t(0, {lower, upper});
    if (height.front() <= m)
    {
        update(1, {height[0] - m, height[0] - m + 1}, node);
    }

    int64_t total = height.front() <= m;
    for (int i = 1; i < n; i++)
    {
        int64_t pos = height[i] - m * (i + 1);

        int64_t cur = query({pos, upper}, node);
        if (cur == 0 && height[i] > m * (i + 1))
        {
            continue;
        }

        update(cur + 1, {pos, pos + 1}, node);
        total = max(total, cur + 1);
    }

    cout << n - total << '\n';

    return 0;
}

Compilation message (stderr)

triusis.cpp:8: warning: ignoring '#pragma region dalykai' [-Wunknown-pragmas]
    8 | #pragma region dalykai
      | 
triusis.cpp:151: warning: ignoring '#pragma endregion ' [-Wunknown-pragmas]
  151 | #pragma endregion
      |

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 28 / 28
• Subtask 4: 37 / 37