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Submission #237237

# Submission time Handle Problem Language Result Execution time Memory
237237 2020-06-05T11:31:40 Z IgorI Cat in a tree (BOI17_catinatree) C++17
11 / 100
 9 ms 5120 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N = 200000;
const int K = 800;

int n, d;
int dp[N][K];
int p[N];
vector<int> graph[N];

void dfs(int v)
{
    for (auto u : graph[v]) dfs(u);
    dp[v][0] = 1;
    for (auto u : graph[v]) dp[v][0] += dp[u][d - 1];
    for (int j = d; j > 0; j--)
    {
        if (2 * j >= d)
        {
            for (auto u : graph[v])
            {
                dp[v][j] += dp[u][j - 1];
            }
        }
        else
        {
            int allow = d - j - 1;
            dp[v][j] = dp[v][d - j];
            int r = 0;
            for (auto u : graph[v])
            {
                r = max(r, dp[u][j - 1] - dp[u][d - j - 1]);
            }
            dp[v][j] += r;
        }
    }
    for (int j = d - 1; j >= 0; j--) dp[v][j] = max(dp[v][j], dp[v][j + 1]);
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> d;
    if (d == 1) cout << n, exit(0);
    for (int i = 1; i < n; i++)
    {
        cin >> p[i];
        graph[p[i]].push_back(i);
    }
    if (d < K)
    {
        dfs(0);
        cout << dp[0][0];
    }
    else
    {
        cout << 1;
    }
}

Compilation message

catinatree.cpp: In function 'void dfs(int)':
catinatree.cpp:31:17: warning: unused variable 'allow' [-Wunused-variable]
             int allow = d - j - 1;
                 ^~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 7 ms 5120 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 4992 KB Output is correct
10 Correct 9 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 4992 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 7 ms 4992 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 7 ms 5120 KB Output is correct
20 Correct 7 ms 5120 KB Output is correct

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 7 ms 5120 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 4992 KB Output is correct
10 Correct 9 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 4992 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 7 ms 4992 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 7 ms 5120 KB Output is correct
20 Correct 7 ms 5120 KB Output is correct
21 Incorrect 8 ms 5120 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 7 ms 5120 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 4992 KB Output is correct
10 Correct 9 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 4992 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 7 ms 4992 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 7 ms 5120 KB Output is correct
20 Correct 7 ms 5120 KB Output is correct
21 Incorrect 8 ms 5120 KB Output isn't correct
22 Halted 0 ms 0 KB -