oj.uz

Submission #705197

# Submission time Handle Problem Language Result Execution time Memory
705197 2023-03-03T14:53:51 Z danikoynov Catfish Farm (IOI22_fish) C++17
44 / 100
 108 ms 13984 KB 
#include "fish.h"

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

const int maxn = 1e5 + 10, smalln = 310;

vector < pair < int, int > > col[maxn];
ll dp[smalln][smalln][2];
ll val[smalln][smalln], pref[smalln][smalln];

ll get_sum(int col, int left, int right)
{
    ll sum = pref[col][right];
    if (left > 0)
        sum = sum - pref[col][left - 1];
    return sum;
}

long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y,
                      std::vector<int> W)
{
    bool all_even = true, small_x = true;
    for (int i = 0; i < M; i ++)
    {
        if (X[i] % 2 != 0)
            all_even = false;
        if (X[i] > 1)
            small_x = false;
    }

    for (int i = 0; i < M; i ++)
    {
        col[X[i]].push_back({Y[i], W[i]});
    }

    for (int i = 0; i < N; i ++)
        sort(col[i].begin(), col[i].end());

    if (all_even)
    {
        ll sum = 0;
        for (int i = 0; i < M; i ++)
            sum = sum + W[i];
        return sum;

    }
    else if (small_x)
    {

        ll zero = 0, one = 0;
        for (int i = 0; i < M; i ++)
        {
            if (X[i] == 0)
                zero += W[i];
            else
                one += W[i];
        }
        if (N == 2)
            return max(zero, one);

        int to = 0;
        ll cur = 0, ans = 0;
        for (int i = 0; i < col[0].size(); i ++)
        {
            if (cur + one > ans)
                ans = cur + one;
            cur += col[0][i].second;
            while(to < col[1].size() && col[1][to].first <= col[0][i].first)
            {
                one -= col[1][to].second;
                to ++;
            }
        }
        if (cur + one > ans)
            ans = cur + one;
        return ans;

    }

    for (int i = 0; i < M; i ++)
    val[X[i]][Y[i]] = W[i];

    /**for (int i = 0; i < N; i ++, cout << endl)
        for (int j = 0; j < N; j ++)
        cout << val[i][j] << " ";*/
    for (int j = 0; j <= N; j ++)
        dp[1][j][0] = dp[1][j][1] = 0;

    for (int i = 0; i < N; i ++)
    {
        pref[i][0] = val[i][0];
        for (int j = 1; j <= N; j ++)
        {
            pref[i][j] = pref[i][j - 1] + val[i][j];
        }
    }
    for (int i = 1; i < N; i ++)
    {

        dp[i][0][1] = dp[i - 1][0][1];
        for (int j = 1; j <= N; j ++)
        {
            dp[i][j][1] = max(dp[i][j - 1][1] + val[i - 1][j - 1], dp[i - 1][j][1]);
        }
        dp[i][N][0] = max(dp[i - 1][N][0], dp[i - 1][N][1]);
        for (int j = N - 1; j >= 0; j --)
        {
            dp[i][j][0] = max(dp[i][j + 1][0] + val[i][j], max(dp[i - 1][j][0], dp[i - 1][j][1]));
        }

        if (i > 1)
        {

        ll best = max(dp[i - 2][0][0], dp[i - 2][0][1]);
        for (int j = 1; j <= N; j ++)
        {
            dp[i][j][1] = max(best + get_sum(i - 1, 0, j - 1), dp[i][j][1]);
            best = max(best, max(dp[i - 2][j][0], dp[i - 2][j][1]));
        }
        best = max(dp[i - 2][N][0], dp[i - 2][N][1]) + get_sum(i - 1, 0, N - 1);
        for (int j = N; j > 0; j --)
        {
            dp[i][j][1] = max(best, dp[i][j][1]);
            best = max(best, max(dp[i - 2][j][0], dp[i - 2][j][1]) + get_sum(i - 1, 0, j - 1));
        }
        }
        for (int j = 0; j <= N; j ++)
        {
            /**for (int len = 0; len < j; len ++)
            {
                //cout << i << " " << j << " " << len << " " << get_sum(i - 1, len, j - 1) << endl;
                //cout << pref[i - 1][j - 1] << endl;
                dp[i][j][1] = max(dp[i][j][1], dp[i - 1][len][1] + get_sum(i - 1, len, j - 1));
            }*/

            /**dp[i][j][1] = max(dp[i][j][1], dp[i - 1][j][1]);
            dp[i][j][1] = max(dp[i][j][1], dp[i - 1][j][0]);
            dp[i][j][0] = max(dp[i][j][0], dp[i - 1][j][0]);
            dp[i][j][0] = max(dp[i][j][0], dp[i - 1][j][1]);*/

            /**for (int len = j + 1; len <= N; len ++)
            {
                dp[i][j][0] = max(dp[i][j][0], max(dp[i - 1][len][0], dp[i - 1][len][1]) + get_sum(i, j, len - 1));
            }*/

            /**if (i > 1 && j > 0)
            {
                for (int len = 0; len <= N; len ++)
                {
                    dp[i][j][1] = max(dp[i][j][1], max(dp[i - 2][len][0], dp[i - 2][len][1]) + get_sum(i - 1, 0, max(len, j) - 1));
                }
            }*/
        }
    }

    /**cout << "-----------" << endl;
    for (int i = 0; i < N; i ++, cout << endl)
        for (int j = 0; j <= N; j ++)
        cout << dp[i][j][0] << " ";
    cout << "-----------" << endl;
    for (int i = 0; i < N; i ++, cout << endl)
        for (int j = 0; j <= N; j ++)
        cout << dp[i][j][1] << " ";*/
    ll ans = 0;
    for (int j = 0; j <= N; j ++)
    for (int t = 0; t < 2; t ++)
    ans = max(ans, dp[N - 1][j][t]);


    return ans;

}

Compilation message

fish.cpp: In function 'long long int max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:65:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for (int i = 0; i < col[0].size(); i ++)
      |                         ~~^~~~~~~~~~~~~~~
fish.cpp:70:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |             while(to < col[1].size() && col[1][to].first <= col[0][i].first)
      |                   ~~~^~~~~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 5700 KB Output is correct
2 Correct 35 ms 6132 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 1 ms 2552 KB Output is correct
5 Correct 107 ms 12284 KB Output is correct
6 Correct 108 ms 13984 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 59 ms 8052 KB Output is correct
3 Correct 73 ms 9124 KB Output is correct
4 Correct 29 ms 5652 KB Output is correct
5 Correct 36 ms 6140 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 1 ms 2644 KB Output is correct
11 Correct 1 ms 2644 KB Output is correct
12 Correct 30 ms 5700 KB Output is correct
13 Correct 37 ms 6140 KB Output is correct
14 Correct 31 ms 5428 KB Output is correct
15 Correct 34 ms 5768 KB Output is correct
16 Correct 30 ms 5532 KB Output is correct
17 Correct 33 ms 5764 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Runtime error 4 ms 5148 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 2 ms 4052 KB Output is correct
10 Correct 4 ms 5588 KB Output is correct
11 Correct 3 ms 4072 KB Output is correct
12 Correct 4 ms 5588 KB Output is correct
13 Correct 2 ms 3296 KB Output is correct
14 Correct 4 ms 5612 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 2 ms 4052 KB Output is correct
10 Correct 4 ms 5588 KB Output is correct
11 Correct 3 ms 4072 KB Output is correct
12 Correct 4 ms 5588 KB Output is correct
13 Correct 2 ms 3296 KB Output is correct
14 Correct 4 ms 5612 KB Output is correct
15 Correct 3 ms 5460 KB Output is correct
16 Correct 3 ms 3380 KB Output is correct
17 Correct 17 ms 7672 KB Output is correct
18 Correct 18 ms 7784 KB Output is correct
19 Correct 18 ms 7984 KB Output is correct
20 Correct 17 ms 8028 KB Output is correct
21 Correct 18 ms 8028 KB Output is correct
22 Correct 33 ms 10096 KB Output is correct
23 Correct 6 ms 5992 KB Output is correct
24 Correct 12 ms 7124 KB Output is correct
25 Correct 4 ms 5588 KB Output is correct
26 Correct 6 ms 5996 KB Output is correct

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 2 ms 4052 KB Output is correct
10 Correct 4 ms 5588 KB Output is correct
11 Correct 3 ms 4072 KB Output is correct
12 Correct 4 ms 5588 KB Output is correct
13 Correct 2 ms 3296 KB Output is correct
14 Correct 4 ms 5612 KB Output is correct
15 Correct 3 ms 5460 KB Output is correct
16 Correct 3 ms 3380 KB Output is correct
17 Correct 17 ms 7672 KB Output is correct
18 Correct 18 ms 7784 KB Output is correct
19 Correct 18 ms 7984 KB Output is correct
20 Correct 17 ms 8028 KB Output is correct
21 Correct 18 ms 8028 KB Output is correct
22 Correct 33 ms 10096 KB Output is correct
23 Correct 6 ms 5992 KB Output is correct
24 Correct 12 ms 7124 KB Output is correct
25 Correct 4 ms 5588 KB Output is correct
26 Correct 6 ms 5996 KB Output is correct
27 Runtime error 5 ms 5596 KB Execution killed with signal 11
28 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Runtime error 4 ms 5148 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 5700 KB Output is correct
2 Correct 35 ms 6132 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 1 ms 2552 KB Output is correct
5 Correct 107 ms 12284 KB Output is correct
6 Correct 108 ms 13984 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 59 ms 8052 KB Output is correct
9 Correct 73 ms 9124 KB Output is correct
10 Correct 29 ms 5652 KB Output is correct
11 Correct 36 ms 6140 KB Output is correct
12 Correct 1 ms 2644 KB Output is correct
13 Correct 1 ms 2644 KB Output is correct
14 Correct 1 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 30 ms 5700 KB Output is correct
19 Correct 37 ms 6140 KB Output is correct
20 Correct 31 ms 5428 KB Output is correct
21 Correct 34 ms 5768 KB Output is correct
22 Correct 30 ms 5532 KB Output is correct
23 Correct 33 ms 5764 KB Output is correct
24 Correct 1 ms 2644 KB Output is correct
25 Runtime error 4 ms 5148 KB Execution killed with signal 11
26 Halted 0 ms 0 KB -