oj.uz

Submission #705205

# Submission time Handle Problem Language Result Execution time Memory
705205 2023-03-03T15:05:05 Z danikoynov Catfish Farm (IOI22_fish) C++17
9 / 100
 136 ms 14216 KB 
#include "fish.h"

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

const int maxn = 1e5 + 10, smalln = 3010;

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 = 1; j <= N; j ++)
        {
            if ((i == 0 || val[i - 1][j - 1] == 0) &&
                (i == N - 1 || val[i + 1][j - 1] == 0))
            {

                dp[i][j][0] = dp[i][j][1] = 0;
            }
            //else
              // cout << i << " " << j << " " << dp[i][j][0] << endl;
        }
    }

    /**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 38 ms 6008 KB Output is correct
2 Correct 40 ms 6308 KB Output is correct
3 Correct 3 ms 2644 KB Output is correct
4 Correct 3 ms 2644 KB Output is correct
5 Correct 125 ms 12456 KB Output is correct
6 Correct 136 ms 14216 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 64 ms 8304 KB Output is correct
3 Correct 83 ms 10016 KB Output is correct
4 Correct 32 ms 5912 KB Output is correct
5 Correct 40 ms 6412 KB Output is correct
6 Correct 2 ms 2656 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 3 ms 2644 KB Output is correct
9 Correct 2 ms 2660 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2656 KB Output is correct
12 Correct 33 ms 5976 KB Output is correct
13 Correct 42 ms 6360 KB Output is correct
14 Correct 35 ms 5552 KB Output is correct
15 Correct 38 ms 6000 KB Output is correct
16 Correct 35 ms 5812 KB Output is correct
17 Correct 36 ms 5956 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Runtime error 8 ms 5156 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 3 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 2 ms 2660 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 3 ms 2652 KB Output is correct
9 Incorrect 3 ms 4948 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '215553967157'
10 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 3 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 2 ms 2660 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 3 ms 2652 KB Output is correct
9 Incorrect 3 ms 4948 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '215553967157'
10 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 3 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 2 ms 2660 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 3 ms 2652 KB Output is correct
9 Incorrect 3 ms 4948 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '215553967157'
10 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Runtime error 8 ms 5156 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 38 ms 6008 KB Output is correct
2 Correct 40 ms 6308 KB Output is correct
3 Correct 3 ms 2644 KB Output is correct
4 Correct 3 ms 2644 KB Output is correct
5 Correct 125 ms 12456 KB Output is correct
6 Correct 136 ms 14216 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 64 ms 8304 KB Output is correct
9 Correct 83 ms 10016 KB Output is correct
10 Correct 32 ms 5912 KB Output is correct
11 Correct 40 ms 6412 KB Output is correct
12 Correct 2 ms 2656 KB Output is correct
13 Correct 2 ms 2644 KB Output is correct
14 Correct 3 ms 2644 KB Output is correct
15 Correct 2 ms 2660 KB Output is correct
16 Correct 2 ms 2644 KB Output is correct
17 Correct 2 ms 2656 KB Output is correct
18 Correct 33 ms 5976 KB Output is correct
19 Correct 42 ms 6360 KB Output is correct
20 Correct 35 ms 5552 KB Output is correct
21 Correct 38 ms 6000 KB Output is correct
22 Correct 35 ms 5812 KB Output is correct
23 Correct 36 ms 5956 KB Output is correct
24 Correct 2 ms 2644 KB Output is correct
25 Runtime error 8 ms 5156 KB Execution killed with signal 11
26 Halted 0 ms 0 KB -