oj.uz

Submission #925384

# Submission time Handle Problem Language Result Execution time Memory
925384 2024-02-11T14:12:11 Z boris_mihov Cats or Dogs (JOI18_catdog) C++17
38 / 100
 3000 ms 8864 KB 
#include "catdog.h"
#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <vector>

typedef long long llong;
const int MAXN = 100000 + 10;
const int INF  = 1e9;

int n;
int timer;
int a[MAXN];
int dp[MAXN][2];
int bl[MAXN][2];
int parent[MAXN];
std::vector <int> g[MAXN];

void buildDFS(int node, int par)
{
    parent[node] = par;
    for (int &u : g[node])
    {
        if (u == par)
        {
            std::swap(u, g[node].back());
            g[node].pop_back();
            break;
        }
    }

    for (const int &u : g[node])
    {
        buildDFS(u, node);
    }
}

int f(int node, int type)
{
    if (bl[node][type] == timer)
    {
        return dp[node][type];
    }

    bl[node][type] = timer;
    dp[node][type] = INF;

    if (a[node] != (type ^ 1))
    {
        dp[node][type] = 0;
        for (const int &u : g[node])
        {
            dp[node][type] += f(u, type);
        }

        int curr = 0;
        for (const int &u : g[node])
        {
            curr += std::min(f(u, type ^ 1) + 1, f(u, type));
        }
    
        dp[node][type] = std::min(dp[node][type], curr);
    } else
    {
        int curr = 1;
        for (const int &u : g[node])
        {
            curr += std::min(f(u, type ^ 1), f(u, type) + 1);
        }
    
        dp[node][type] = std::min(dp[node][type], curr);
    }

    return dp[node][type];
}

void initialize(int N, std::vector <int> A, std::vector <int> B) 
{
    n = N;
    std::fill(a + 1, a + 1 + n, 2);
    for (int i = 0 ; i < n - 1 ; ++i)
    {
        g[A[i]].push_back(B[i]);
        g[B[i]].push_back(A[i]);
    }

    buildDFS(1, 0);
}

int cat(int v) 
{
    timer++;
    a[v] = 0;       
    return std::min(f(1, 0), f(1, 1));
}

int dog(int v) 
{
    timer++;
    a[v] = 1;
    return std::min(f(1, 0), f(1, 1));
}

int neighbor(int v) 
{
    timer++;
    a[v] = 2;
    return std::min(f(1, 0), f(1, 1));
}

/*
9
5 3
4 9
5 4
4 1
5 7
7 6
4 8
2 3
6
2 9
2 5
1 1
2 2
1 4
1 3
*/

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4708 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 2 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4952 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4720 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 4700 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4708 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 2 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4952 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4720 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 4700 KB Output is correct
17 Correct 16 ms 4700 KB Output is correct
18 Correct 20 ms 4700 KB Output is correct
19 Correct 10 ms 4700 KB Output is correct
20 Correct 1 ms 4700 KB Output is correct
21 Correct 4 ms 4700 KB Output is correct
22 Correct 5 ms 4700 KB Output is correct
23 Correct 23 ms 4700 KB Output is correct
24 Correct 19 ms 4700 KB Output is correct
25 Correct 9 ms 4760 KB Output is correct
26 Correct 4 ms 4700 KB Output is correct
27 Correct 3 ms 4700 KB Output is correct
28 Correct 6 ms 4696 KB Output is correct
29 Correct 28 ms 4700 KB Output is correct
30 Correct 4 ms 4700 KB Output is correct
31 Correct 3 ms 4700 KB Output is correct
32 Correct 6 ms 4700 KB Output is correct

Subtask #3
0 / 62.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4708 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 2 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4952 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4720 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 4700 KB Output is correct
17 Correct 16 ms 4700 KB Output is correct
18 Correct 20 ms 4700 KB Output is correct
19 Correct 10 ms 4700 KB Output is correct
20 Correct 1 ms 4700 KB Output is correct
21 Correct 4 ms 4700 KB Output is correct
22 Correct 5 ms 4700 KB Output is correct
23 Correct 23 ms 4700 KB Output is correct
24 Correct 19 ms 4700 KB Output is correct
25 Correct 9 ms 4760 KB Output is correct
26 Correct 4 ms 4700 KB Output is correct
27 Correct 3 ms 4700 KB Output is correct
28 Correct 6 ms 4696 KB Output is correct
29 Correct 28 ms 4700 KB Output is correct
30 Correct 4 ms 4700 KB Output is correct
31 Correct 3 ms 4700 KB Output is correct
32 Correct 6 ms 4700 KB Output is correct
33 Execution timed out 3046 ms 8864 KB Time limit exceeded
34 Halted 0 ms 0 KB -