oj.uz

Submission #941078

# Submission time Handle Problem Language Result Execution time Memory
941078 2024-03-08T06:32:48 Z vjudge1 Wombats (IOI13_wombats) C++17
76 / 100
 20000 ms 183868 KB 
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#include <x86intrin.h>

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

#include "wombats.h"

#define f first
#define s second
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back

int n, m;
vector<vector<int>> hor, vert;

struct segTree
{
    struct Node
    {
        vector<vector<int>> dist;
    };
    vector<Node> tree;
    int sz = 0;

    void init(int n)
    {
        sz = 1;
        while (sz < n)
            sz *= 2;
        tree.resize(2 * sz);
    }

    void merge(Node &res, Node &a, Node &b)
    {
        if (b.dist.size() == 0)
        {
            res = a;
            return;
        }

        int c = a.dist.size();

        if (res.dist.size() == 0)
            res.dist.resize(c, vector<int>(c));

        vector<vector<int>> opt(m, vector<int>(m));

        int cntO = 0;

        for (int val = -(c + 1); val < c; ++val)
            for (int i = 0; i < c; ++i)
            {
                int j = i - val;

                if (j >= 0 and j < c)
                {
                    res.dist[i][j] = 1e9 + 500;
                    int L = i ? opt[i - 1][j] : 0;
                    int R = j + 1 < c ? opt[i][j + 1] : m - 1;
                    for (int p = L; p <= R; ++p)
                        if (res.dist[i][j] > a.dist[i][p] + b.dist[p][j])
                        {
                            cntO++;
                            if (cntO > 1e6)
                                exit(0);
                            res.dist[i][j] = a.dist[i][p] + b.dist[p][j];
                            opt[i][j] = p;
                        }
                }
            }
    }

    void build(vector<vector<vector<int>>> &bf, int v, int lv, int rv)
    {
        if (rv - lv == 1)
        {
            if (lv < bf.size())
                tree[v].dist = bf[lv];
            return;
        }
        int m = (lv + rv) >> 1;
        build(bf, v * 2 + 1, lv, m);
        build(bf, v * 2 + 2, m, rv);
        merge(tree[v], tree[v * 2 + 1], tree[v * 2 + 2]);
    }

    void build(vector<vector<vector<int>>> &bf)
    {
        init(bf.size());
        build(bf, 0, 0, sz);
    }

    void set(int pos, vector<vector<int>> &dists, int v, int lv, int rv)
    {
        if (rv - lv == 1)
        {
            tree[v].dist = dists;
            return;
        }
        int m = (lv + rv) >> 1;
        if (pos < m)
            set(pos, dists, v * 2 + 1, lv, m);
        else
            set(pos, dists, v * 2 + 2, m, rv);
        merge(tree[v], tree[v * 2 + 1], tree[v * 2 + 2]);
        // cout << lv << " " << rv << ":\n";
        // for (int i = 0; i < tree[v].dist.size(); ++i)
        //     for (int j = 0; j < tree[v].dist.size(); ++j)
        //         cout << i << " " << j << ": " << tree[v].dist[i][j] << "\n";

        // cout << "\n";
    }

    void set(int pos, vector<vector<int>> &dists)
    {
        set(pos, dists, 0, 0, sz);
    }
};

segTree tree;

vector<vector<int>> calc(int x)
{
    vector<vector<int>> dists;

    dists.resize(m, vector<int>(m, 1e9 + 10));

    int l = x;
    int r = min(x + 15, n - 1);

    vector<int> newD(m);
    for (int st = 0; st < m; ++st)
    {
        auto &d = dists[st];
        d[st] = 0;
        for (int i = 1; i < m; ++i)
            d[i] = min(d[i], d[i - 1] + hor[l][i - 1]);
        for (int i = m - 2; i >= 0; --i)
            d[i] = min(d[i], d[i + 1] + hor[l][i]);

        for (int x = l; x < r; ++x)
        {
            for (int i = 0; i < m; ++i)
                newD[i] = d[i] + vert[x][i];

            for (int i = 1; i < m; ++i)
                newD[i] = min(newD[i], newD[i - 1] + hor[x + 1][i - 1]);
            for (int i = m - 2; i >= 0; --i)
                newD[i] = min(newD[i], newD[i + 1] + hor[x + 1][i]);

            d = newD;
        }
    }

    return dists;
}

void init(int R, int C, int H[5000][200], int V[5000][200])
{
    n = R;
    m = C;

    hor.resize(n + 1, vector<int>(m + 1));
    vert.resize(n + 1, vector<int>(m + 1));
    for (int i = 0; i < n; ++i)
        for (int j = 0; j < m; ++j)
        {
            if (j + 1 < m)
                hor[i][j] = H[i][j];
            if (i + 1 < n)
                vert[i][j] = V[i][j];
        }

    vector<vector<vector<int>>> bf;
    for (int i = 0; i + 1 < n; i += 15)
    {
        vector<vector<int>> cur = calc(i);
        bf.pb(cur);
    }
    tree.build(bf);
}

void changeH(int P, int Q, int W)
{
    /* ... */
    hor[P][Q] = W;
    if (P)
    {
        vector<vector<int>> cur = calc(((P - 1) / 15) * 15);
        tree.set((P - 1) / 15, cur);
    }
    if (P != n - 1)
    {
        vector<vector<int>> cur = calc((P / 15) * 15);
        tree.set(P / 15, cur);
    }
}

void changeV(int P, int Q, int W)
{
    /* ... */
    vert[P][Q] = W;
    if (P)
    {
        vector<vector<int>> cur = calc(((P - 1) / 15) * 15);
        tree.set((P - 1) / 15, cur);
    }
    if (P != n - 1)
    {
        vector<vector<int>> cur = calc((P / 15) * 15);
        tree.set(P / 15, cur);
    }
}

int escape(int V1, int V2)
{
    return tree.tree[0].dist[V1][V2];
}

// // /////////////////////////////

// #include <stdio.h>
// #include <stdlib.h>
// #include <assert.h>
// #include <vector>
// #include "wombats.h"

// static int H[5000][200];
// static int V[5000][200];

// int main()
// {
//     int R, C, E, P, Q, W, V1, V2, event, i, j;

//     assert(scanf("%d%d", &R, &C) == 2);
//     for (i = 0; i < R; ++i)
//         for (j = 0; j < C - 1; ++j)
//             assert(scanf("%d", &H[i][j]) == 1);
//     for (i = 0; i < R - 1; ++i)
//         for (j = 0; j < C; ++j)
//             assert(scanf("%d", &V[i][j]) == 1);

//     init(R, C, H, V);

//     std::vector<int> answers;

//     assert(scanf("%d", &E) == 1);
//     for (i = 0; i < E; i++)
//     {
//         assert(scanf("%d", &event) == 1);
//         if (event == 1)
//         {
//             assert(scanf("%d%d%d", &P, &Q, &W) == 3);
//             changeH(P, Q, W);
//         }
//         else if (event == 2)
//         {
//             assert(scanf("%d%d%d", &P, &Q, &W) == 3);
//             changeV(P, Q, W);
//         }
//         else if (event == 3)
//         {
//             assert(scanf("%d%d", &V1, &V2) == 2);
//             answers.push_back(escape(V1, V2));
//         }
//     }
//     for (int ans : answers)
//     {
//         printf("%d\n", ans);
//     }
//     return 0;
// }

Compilation message

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~
wombats.cpp: In member function 'void segTree::build(std::vector<std::vector<std::vector<int> > >&, int, int, int)':
wombats.cpp:81:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::vector<int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |             if (lv < bf.size())
      |                 ~~~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5208 KB Output is correct
2 Correct 4 ms 5208 KB Output is correct
3 Correct 56 ms 6740 KB Output is correct
4 Correct 4 ms 5208 KB Output is correct
5 Correct 3 ms 5208 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 57 ms 3332 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 703 ms 3420 KB Output is correct
2 Correct 742 ms 3564 KB Output is correct
3 Correct 802 ms 3580 KB Output is correct
4 Correct 783 ms 3572 KB Output is correct
5 Correct 786 ms 3568 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 3842 ms 3576 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 8796 KB Output is correct
2 Correct 7 ms 8976 KB Output is correct
3 Correct 10 ms 8796 KB Output is correct
4 Correct 34 ms 9564 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 701 ms 3580 KB Output is correct
2 Correct 736 ms 3416 KB Output is correct
3 Correct 771 ms 3576 KB Output is correct
4 Correct 775 ms 3576 KB Output is correct
5 Correct 780 ms 3568 KB Output is correct
6 Correct 7 ms 8796 KB Output is correct
7 Correct 7 ms 8796 KB Output is correct
8 Correct 7 ms 8796 KB Output is correct
9 Correct 47 ms 9552 KB Output is correct
10 Correct 3 ms 5212 KB Output is correct
11 Correct 3 ms 5212 KB Output is correct
12 Correct 55 ms 6704 KB Output is correct
13 Correct 5 ms 5208 KB Output is correct
14 Correct 3 ms 5208 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2480 KB Output is correct
23 Correct 1 ms 2392 KB Output is correct
24 Correct 1 ms 2392 KB Output is correct
25 Correct 54 ms 3412 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 3735 ms 3580 KB Output is correct
28 Correct 6055 ms 56360 KB Output is correct
29 Correct 6497 ms 47236 KB Output is correct
30 Correct 6360 ms 47504 KB Output is correct
31 Correct 6607 ms 57440 KB Output is correct
32 Correct 1 ms 2396 KB Output is correct

Subtask #6
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 707 ms 3576 KB Output is correct
2 Correct 741 ms 3576 KB Output is correct
3 Correct 766 ms 3576 KB Output is correct
4 Correct 781 ms 3576 KB Output is correct
5 Correct 783 ms 3660 KB Output is correct
6 Correct 7 ms 8796 KB Output is correct
7 Correct 7 ms 8796 KB Output is correct
8 Correct 7 ms 8792 KB Output is correct
9 Correct 36 ms 9664 KB Output is correct
10 Correct 3 ms 5208 KB Output is correct
11 Correct 3 ms 5212 KB Output is correct
12 Correct 59 ms 7116 KB Output is correct
13 Correct 3 ms 5208 KB Output is correct
14 Correct 3 ms 5208 KB Output is correct
15 Correct 4840 ms 181896 KB Output is correct
16 Execution timed out 20056 ms 183868 KB Time limit exceeded
17 Halted 0 ms 0 KB -