oj.uz

Submission #941088

# Submission time Handle Problem Language Result Execution time Memory
941088 2024-03-08T06:42:53 Z vjudge1 Wombats (IOI13_wombats) C++17
100 / 100
 9725 ms 183580 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 > 100000)
                                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);
    // if (n > 4000 and m > 150)
    //     exit(0);
}

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 6 ms 5208 KB Output is correct
2 Correct 4 ms 5200 KB Output is correct
3 Correct 63 ms 6896 KB Output is correct
4 Correct 3 ms 5212 KB Output is correct
5 Correct 4 ms 5212 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 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 2392 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 55 ms 3376 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 260 ms 3576 KB Output is correct
2 Correct 272 ms 3568 KB Output is correct
3 Correct 288 ms 3580 KB Output is correct
4 Correct 285 ms 3420 KB Output is correct
5 Correct 299 ms 3568 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1358 ms 3668 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 5 ms 8796 KB Output is correct
2 Correct 7 ms 8972 KB Output is correct
3 Correct 8 ms 8796 KB Output is correct
4 Correct 33 ms 9660 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 259 ms 3416 KB Output is correct
2 Correct 277 ms 3568 KB Output is correct
3 Correct 280 ms 3572 KB Output is correct
4 Correct 285 ms 3416 KB Output is correct
5 Correct 290 ms 3572 KB Output is correct
6 Correct 5 ms 8796 KB Output is correct
7 Correct 5 ms 8796 KB Output is correct
8 Correct 5 ms 8796 KB Output is correct
9 Correct 32 ms 9564 KB Output is correct
10 Correct 3 ms 5212 KB Output is correct
11 Correct 3 ms 5212 KB Output is correct
12 Correct 56 ms 6812 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 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 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2648 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 54 ms 3500 KB Output is correct
26 Correct 1 ms 2392 KB Output is correct
27 Correct 1439 ms 3588 KB Output is correct
28 Correct 2214 ms 56508 KB Output is correct
29 Correct 2308 ms 47516 KB Output is correct
30 Correct 2292 ms 47436 KB Output is correct
31 Correct 2353 ms 57252 KB Output is correct
32 Correct 1 ms 2396 KB Output is correct

Subtask #6
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 258 ms 3420 KB Output is correct
2 Correct 270 ms 3564 KB Output is correct
3 Correct 284 ms 3576 KB Output is correct
4 Correct 290 ms 3576 KB Output is correct
5 Correct 292 ms 3564 KB Output is correct
6 Correct 5 ms 8792 KB Output is correct
7 Correct 6 ms 8836 KB Output is correct
8 Correct 6 ms 8796 KB Output is correct
9 Correct 33 ms 9660 KB Output is correct
10 Correct 3 ms 5212 KB Output is correct
11 Correct 3 ms 5212 KB Output is correct
12 Correct 61 ms 6736 KB Output is correct
13 Correct 3 ms 5208 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 1926 ms 181848 KB Output is correct
16 Correct 9725 ms 183352 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 2 ms 2488 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2392 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 54 ms 3336 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 1364 ms 3580 KB Output is correct
30 Correct 2195 ms 56084 KB Output is correct
31 Correct 8893 ms 183248 KB Output is correct
32 Correct 9179 ms 182460 KB Output is correct
33 Correct 2302 ms 47280 KB Output is correct
34 Correct 9224 ms 151020 KB Output is correct
35 Correct 2285 ms 47112 KB Output is correct
36 Correct 9224 ms 151368 KB Output is correct
37 Correct 2438 ms 57536 KB Output is correct
38 Correct 9257 ms 183580 KB Output is correct
39 Correct 1 ms 2396 KB Output is correct
40 Correct 9697 ms 150788 KB Output is correct