oj.uz

Submission #705198

# Submission time Handle Problem Language Result Execution time Memory
705198 2023-03-03T14:54:18 Z danikoynov Catfish Farm (IOI22_fish) C++17
61 / 100
 342 ms 301412 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));
            }
        }

    }

    /**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 30 ms 5708 KB Output is correct
2 Correct 37 ms 6136 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 111 ms 12312 KB Output is correct
6 Correct 130 ms 13980 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 58 ms 8052 KB Output is correct
3 Correct 72 ms 9024 KB Output is correct
4 Correct 30 ms 5648 KB Output is correct
5 Correct 36 ms 6120 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 3 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 30 ms 5668 KB Output is correct
13 Correct 35 ms 6112 KB Output is correct
14 Correct 30 ms 5432 KB Output is correct
15 Correct 35 ms 5764 KB Output is correct
16 Correct 30 ms 5556 KB Output is correct
17 Correct 33 ms 5768 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 9 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 2 ms 2644 KB Output is correct
3 Correct 2 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 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 4 ms 4948 KB Output is correct
10 Correct 6 ms 8404 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 5 ms 8380 KB Output is correct
13 Correct 2 ms 3668 KB Output is correct
14 Correct 5 ms 8324 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 2 ms 2644 KB Output is correct
3 Correct 2 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 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 4 ms 4948 KB Output is correct
10 Correct 6 ms 8404 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 5 ms 8380 KB Output is correct
13 Correct 2 ms 3668 KB Output is correct
14 Correct 5 ms 8324 KB Output is correct
15 Correct 5 ms 8404 KB Output is correct
16 Correct 3 ms 3540 KB Output is correct
17 Correct 20 ms 9856 KB Output is correct
18 Correct 19 ms 10064 KB Output is correct
19 Correct 18 ms 10452 KB Output is correct
20 Correct 18 ms 10452 KB Output is correct
21 Correct 19 ms 10480 KB Output is correct
22 Correct 32 ms 12544 KB Output is correct
23 Correct 7 ms 9300 KB Output is correct
24 Correct 14 ms 10068 KB Output is correct
25 Correct 5 ms 8404 KB Output is correct
26 Correct 10 ms 8916 KB Output is correct

Subtask #6
17.0 / 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 2 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 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 4 ms 4948 KB Output is correct
10 Correct 6 ms 8404 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 5 ms 8380 KB Output is correct
13 Correct 2 ms 3668 KB Output is correct
14 Correct 5 ms 8324 KB Output is correct
15 Correct 5 ms 8404 KB Output is correct
16 Correct 3 ms 3540 KB Output is correct
17 Correct 20 ms 9856 KB Output is correct
18 Correct 19 ms 10064 KB Output is correct
19 Correct 18 ms 10452 KB Output is correct
20 Correct 18 ms 10452 KB Output is correct
21 Correct 19 ms 10480 KB Output is correct
22 Correct 32 ms 12544 KB Output is correct
23 Correct 7 ms 9300 KB Output is correct
24 Correct 14 ms 10068 KB Output is correct
25 Correct 5 ms 8404 KB Output is correct
26 Correct 10 ms 8916 KB Output is correct
27 Correct 189 ms 227020 KB Output is correct
28 Correct 84 ms 37556 KB Output is correct
29 Correct 318 ms 234292 KB Output is correct
30 Correct 342 ms 276616 KB Output is correct
31 Correct 290 ms 277136 KB Output is correct
32 Correct 110 ms 35616 KB Output is correct
33 Correct 297 ms 301288 KB Output is correct
34 Correct 283 ms 301412 KB Output is correct
35 Correct 203 ms 235948 KB Output is correct
36 Correct 259 ms 247816 KB Output is correct

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Runtime error 9 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 30 ms 5708 KB Output is correct
2 Correct 37 ms 6136 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 111 ms 12312 KB Output is correct
6 Correct 130 ms 13980 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 58 ms 8052 KB Output is correct
9 Correct 72 ms 9024 KB Output is correct
10 Correct 30 ms 5648 KB Output is correct
11 Correct 36 ms 6120 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 3 ms 2644 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct
18 Correct 30 ms 5668 KB Output is correct
19 Correct 35 ms 6112 KB Output is correct
20 Correct 30 ms 5432 KB Output is correct
21 Correct 35 ms 5764 KB Output is correct
22 Correct 30 ms 5556 KB Output is correct
23 Correct 33 ms 5768 KB Output is correct
24 Correct 2 ms 2644 KB Output is correct
25 Runtime error 9 ms 5148 KB Execution killed with signal 11
26 Halted 0 ms 0 KB -