oj.uz

Submission #678778

# Submission time Handle Problem Language Result Execution time Memory
678778 2023-01-06T14:24:56 Z pls33 Catfish Farm (IOI22_fish) C++17
44 / 100
 1000 ms 2097152 KB 
#include <bits/stdc++.h>

#ifndef _AAAAAAAAA
#include "fish.h"
#endif

using namespace std;
#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>;
#pragma endregion

struct node_t
{
    int64_t val;
    p32 range;
    node_t *left, *right;

    node_t(p32 r)
    {
        val = 0;
        range = r;
        left = nullptr;
        right = nullptr;
    }

    void update()
    {
        if (!right || range.second - range.first == 1)
        {
            return;
        }

        val = max(left->val, right->val);
    }

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

        int mid = (range.first + range.second) / 2;
        left = new node_t({range.first, mid});
        right = new node_t({mid, range.second});
    }

    int contains(p32 query)
    {
        if (query.first >= range.second || query.second <= range.first)
        {
            return 0;
        }

        if (range.first >= query.first && range.second <= query.second)
        {
            return 1;
        }

        return 2;
    }
};

void update(node_t *node, int64_t val, p32 dest)
{
    if (!node || !node->contains(dest))
    {
        return;
    }

    if (node->contains(dest) == 1)
    {
        node->val = max(node->val, val);
        return;
    }

    node->expand();
    update(node->left, val, dest);
    update(node->right, val, dest);
    node->update();
}

int64_t query(node_t *node, p32 dest)
{
    if (!node || !node->contains(dest))
    {
        return 0;
    }

    if (node->contains(dest) == 1)
    {
        return node->val;
    }

    return max(query(node->left, dest),
               query(node->right, dest));
}

void assign_max(int64_t val, p32 fish, vvi64 &vect)
{
    vect[fish.first][fish.second] = max(vect[fish.first][fish.second], val);
}

int64_t weight_sum(int i, int j, vvi64 &prefix, int row)
{
    if (i == -1)
    {
        return 0;
    }

    int64_t sum = prefix[row][j];

    if (i)
    {
        sum -= prefix[row][i - 1];
    }

    return sum;
}

int64_t new_weight(p32 lhs, p32 rhs, vvi64 &prefix)
{
    int64_t left = rhs.first > 0
                       ? weight_sum(0, rhs.second, prefix, rhs.first - 1)
                       : 0;

    int64_t right = (rhs.first + 1 < (int)prefix.size())
                        ? weight_sum(0, rhs.second, prefix, rhs.first + 1)
                        : 0;

    if (lhs.first == -1)
    {
        return left + right;
    }

    if (rhs.first - lhs.first > 2)
    {
        return left + right;
    }

    if (rhs.first - lhs.first == 2)
    {
        if (lhs.second >= rhs.second)
        {
            return right;
        }
        left -= weight_sum(0, lhs.second, prefix, rhs.first - 1);
        return left + right;
    }

    if (lhs.second > rhs.second)
    {
        left = -weight_sum(0, rhs.second, prefix, rhs.first);
        return left + right;
    }

    left -= weight_sum(0, lhs.second, prefix, rhs.first) +
            weight_sum(0, lhs.second, prefix, rhs.first - 1);
    return left + right;
}

long long max_weights(int N, int M,
                      std::vector<int> X,
                      std::vector<int> Y,
                      std::vector<int> W)
{
    vp32 fish;

    int max_y = 0;
    for (int i = 0; i < M; i++)
    {
        max_y = max(max_y, Y[i]);
        if (X[i])
        {
            fish.push_back({X[i] - 1, Y[i]});
        }
        if (X[i] < N - 1)
        {
            fish.push_back({X[i] + 1, Y[i]});
        }
    }

    vvi64 prefix(N, vi64(max_y + 1));
    for (int i = 0; i < M; i++)
    {
        prefix[X[i]][Y[i]] = W[i];
    }

    for (auto &row : prefix)
    {
        for (int i = 1; i < (int)row.size(); i++)
        {
            row[i] += row[i - 1];
        }
    }

    sort(fish.begin(), fish.end());
    auto it = unique(fish.begin(), fish.end());
    fish.erase(it, fish.end());

    vvi64 decrease(N, vi64(max_y + 1));
    vvi64 increase(N, vi64(max_y + 1));
    vp32 check;

    node_t *fish_count = new node_t({0, N});
    for (auto &f : fish)
    {
        int64_t initial = new_weight(p32(-1, -1), f, prefix);
        if (f.first > 2)
        {
            initial += query(fish_count, {0, f.first - 2});
        }

        assign_max(initial, f, increase);
        assign_max(initial, f, decrease);
        check.push_back(f);
        for (int cur = (int)check.size() - 2; cur >= 0; cur--)
        {
            auto &[i, j] = check[cur];
            if (f.first - i > 3)
            {
                break;
            }

            if (i == f.first)
            {
                continue;
            }
            int64_t prev = new_weight(p32(i, j), f, prefix);
            if (i == f.first - 1)
            {
                if (j < f.second)
                {
                    assign_max(prev + increase[i][j], f, increase);
                }
                else
                {
                    assign_max(prev + decrease[i][j], f, decrease);
                }
            }
            else
            {
                prev += max(increase[i][j], decrease[i][j]);
                assign_max(prev, f, increase);
                assign_max(prev, f, decrease);
            }
        }

        update(fish_count,
               max(increase[f.first][f.second], decrease[f.first][f.second]),
               {f.first, f.first + 1});
    }

    return fish_count->val;
}

#ifdef _AAAAAAAAA
int main()
{
    freopen("fish.in", "r", stdin);
#ifndef __linux__
    atexit([]()
           {
        freopen("con", "r", stdin);
        system("pause"); });
#endif

    int N, M;
    assert(2 == scanf("%d %d", &N, &M));

    std::vector<int> X(M), Y(M), W(M);
    for (int i = 0; i < M; ++i)
    {
        assert(3 == scanf("%d %d %d", &X[i], &Y[i], &W[i]));
    }

    long long result = max_weights(N, M, X, Y, W);
    printf("%lld\n", result);
    return 0;
}
#endif

Compilation message

fish.cpp:8: warning: ignoring '#pragma region dalykai' [-Wunknown-pragmas]
    8 | #pragma region dalykai
      | 
fish.cpp:31: warning: ignoring '#pragma endregion ' [-Wunknown-pragmas]
   31 | #pragma endregion
      |

Subtask #1
0 / 3.0

# Verdict Execution time Memory Grader output
1 Runtime error 741 ms 2097152 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 747 ms 2097152 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 16724 KB Output is correct
2 Correct 20 ms 16684 KB Output is correct
3 Correct 66 ms 24120 KB Output is correct
4 Correct 59 ms 23968 KB Output is correct
5 Correct 105 ms 32388 KB Output is correct
6 Correct 99 ms 31784 KB Output is correct
7 Correct 103 ms 32388 KB Output is correct
8 Correct 123 ms 32316 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 3 ms 596 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 440 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 2 ms 468 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 3 ms 596 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 440 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 3 ms 2476 KB Output is correct
16 Correct 5 ms 596 KB Output is correct
17 Correct 338 ms 5976 KB Output is correct
18 Correct 366 ms 5940 KB Output is correct
19 Correct 214 ms 5792 KB Output is correct
20 Correct 161 ms 5796 KB Output is correct
21 Correct 177 ms 4756 KB Output is correct
22 Correct 568 ms 8680 KB Output is correct
23 Correct 27 ms 3280 KB Output is correct
24 Correct 184 ms 4880 KB Output is correct
25 Correct 2 ms 572 KB Output is correct
26 Correct 32 ms 3144 KB Output is correct

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 3 ms 596 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 440 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 3 ms 2476 KB Output is correct
16 Correct 5 ms 596 KB Output is correct
17 Correct 338 ms 5976 KB Output is correct
18 Correct 366 ms 5940 KB Output is correct
19 Correct 214 ms 5792 KB Output is correct
20 Correct 161 ms 5796 KB Output is correct
21 Correct 177 ms 4756 KB Output is correct
22 Correct 568 ms 8680 KB Output is correct
23 Correct 27 ms 3280 KB Output is correct
24 Correct 184 ms 4880 KB Output is correct
25 Correct 2 ms 572 KB Output is correct
26 Correct 32 ms 3144 KB Output is correct
27 Correct 111 ms 212224 KB Output is correct
28 Execution timed out 1099 ms 24664 KB Time limit exceeded
29 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 16724 KB Output is correct
2 Correct 20 ms 16684 KB Output is correct
3 Correct 66 ms 24120 KB Output is correct
4 Correct 59 ms 23968 KB Output is correct
5 Correct 105 ms 32388 KB Output is correct
6 Correct 99 ms 31784 KB Output is correct
7 Correct 103 ms 32388 KB Output is correct
8 Correct 123 ms 32316 KB Output is correct
9 Runtime error 764 ms 2097152 KB Execution killed with signal 9
10 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 741 ms 2097152 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -