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Submission #237236

# Submission time Handle Problem Language Result Execution time Memory
237236 2020-06-05T11:30:38 Z IgorI Cat in a tree (BOI17_catinatree) C++17
51 / 100
 280 ms 524292 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N = 200000;
const int K = 2000;

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 8 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 8 ms 5120 KB Output is correct
4 Correct 8 ms 5120 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 8 ms 5120 KB Output is correct
7 Correct 7 ms 5248 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 8 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 8 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
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 8 ms 5120 KB Output is correct
4 Correct 8 ms 5120 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 8 ms 5120 KB Output is correct
7 Correct 7 ms 5248 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 8 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 8 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 Correct 24 ms 17024 KB Output is correct
22 Correct 7 ms 4992 KB Output is correct
23 Correct 8 ms 7040 KB Output is correct
24 Correct 9 ms 7040 KB Output is correct
25 Correct 7 ms 4992 KB Output is correct
26 Correct 9 ms 9088 KB Output is correct
27 Correct 9 ms 9088 KB Output is correct
28 Correct 11 ms 11264 KB Output is correct
29 Correct 11 ms 11136 KB Output is correct
30 Correct 11 ms 11136 KB Output is correct
31 Correct 11 ms 11392 KB Output is correct
32 Correct 11 ms 11040 KB Output is correct
33 Correct 10 ms 11008 KB Output is correct
34 Correct 10 ms 10752 KB Output is correct
35 Correct 10 ms 10752 KB Output is correct
36 Correct 11 ms 11136 KB Output is correct
37 Correct 12 ms 11136 KB Output is correct
38 Correct 11 ms 11392 KB Output is correct
39 Correct 11 ms 11520 KB Output is correct
40 Correct 11 ms 11264 KB Output is correct

Subtask #3
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 8 ms 5120 KB Output is correct
4 Correct 8 ms 5120 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 8 ms 5120 KB Output is correct
7 Correct 7 ms 5248 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 8 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 8 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 Correct 24 ms 17024 KB Output is correct
22 Correct 7 ms 4992 KB Output is correct
23 Correct 8 ms 7040 KB Output is correct
24 Correct 9 ms 7040 KB Output is correct
25 Correct 7 ms 4992 KB Output is correct
26 Correct 9 ms 9088 KB Output is correct
27 Correct 9 ms 9088 KB Output is correct
28 Correct 11 ms 11264 KB Output is correct
29 Correct 11 ms 11136 KB Output is correct
30 Correct 11 ms 11136 KB Output is correct
31 Correct 11 ms 11392 KB Output is correct
32 Correct 11 ms 11040 KB Output is correct
33 Correct 10 ms 11008 KB Output is correct
34 Correct 10 ms 10752 KB Output is correct
35 Correct 10 ms 10752 KB Output is correct
36 Correct 11 ms 11136 KB Output is correct
37 Correct 12 ms 11136 KB Output is correct
38 Correct 11 ms 11392 KB Output is correct
39 Correct 11 ms 11520 KB Output is correct
40 Correct 11 ms 11264 KB Output is correct
41 Runtime error 280 ms 524292 KB Execution killed with signal 9 (could be triggered by violating memory limits)
42 Halted 0 ms 0 KB -