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Submission #925392

# Submission time Handle Problem Language Result Execution time Memory
925392 2024-02-11T14:19:48 Z ttamx Cat in a tree (BOI17_catinatree) C++14
100 / 100
 212 ms 157008 KB 
#include<bits/stdc++.h>

using namespace std;

const int N=2e5+5;

int n,d;
vector<int> adj[N];
deque<int> dp[N];

int get(int i,int j){
    return j<dp[i].size()?dp[i][j]:0;
}

void dfs(int u){
    dp[u].emplace_back(1);
    for(auto v:adj[u]){
        dfs(v);
        dp[v].emplace_front(dp[v][0]);
        if(dp[v].size()>dp[u].size())swap(dp[u],dp[v]);
        for(int i=0;i<dp[v].size();i++){
            int du=dp[u][i]+get(v,max(i,d-i));
            int dv=dp[v][i]+get(u,max(i,d-i));
            dp[u][i]=max(du,dv);
        }
        for(int i=dp[v].size()-2;i>=0;i--)dp[u][i]=max(dp[u][i],dp[u][i+1]);
        dp[v].clear();
    }
    if(dp[u].size()>d)dp[u].pop_back();
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> d;
    for(int i=1;i<n;i++){
        int p;
        cin >> p;
        adj[p].emplace_back(i);
    }
    dfs(0);
    cout << dp[0][0];
}

Compilation message

catinatree.cpp: In function 'int get(int, int)':
catinatree.cpp:12:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     return j<dp[i].size()?dp[i][j]:0;
      |            ~^~~~~~~~~~~~~
catinatree.cpp: In function 'void dfs(int)':
catinatree.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |         for(int i=0;i<dp[v].size();i++){
      |                     ~^~~~~~~~~~~~~
catinatree.cpp:29:20: warning: comparison of integer expressions of different signedness: 'std::deque<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   29 |     if(dp[u].size()>d)dp[u].pop_back();
      |        ~~~~~~~~~~~~^~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 139768 KB Output is correct
2 Correct 62 ms 139604 KB Output is correct
3 Correct 61 ms 139600 KB Output is correct
4 Correct 61 ms 139604 KB Output is correct
5 Correct 63 ms 139536 KB Output is correct
6 Correct 63 ms 139600 KB Output is correct
7 Correct 69 ms 139668 KB Output is correct
8 Correct 64 ms 139760 KB Output is correct
9 Correct 63 ms 139768 KB Output is correct
10 Correct 63 ms 139764 KB Output is correct
11 Correct 64 ms 139704 KB Output is correct
12 Correct 67 ms 139600 KB Output is correct
13 Correct 62 ms 139856 KB Output is correct
14 Correct 64 ms 139628 KB Output is correct
15 Correct 64 ms 139604 KB Output is correct
16 Correct 78 ms 139596 KB Output is correct
17 Correct 61 ms 139768 KB Output is correct
18 Correct 64 ms 139764 KB Output is correct
19 Correct 64 ms 139596 KB Output is correct
20 Correct 63 ms 139600 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 139768 KB Output is correct
2 Correct 62 ms 139604 KB Output is correct
3 Correct 61 ms 139600 KB Output is correct
4 Correct 61 ms 139604 KB Output is correct
5 Correct 63 ms 139536 KB Output is correct
6 Correct 63 ms 139600 KB Output is correct
7 Correct 69 ms 139668 KB Output is correct
8 Correct 64 ms 139760 KB Output is correct
9 Correct 63 ms 139768 KB Output is correct
10 Correct 63 ms 139764 KB Output is correct
11 Correct 64 ms 139704 KB Output is correct
12 Correct 67 ms 139600 KB Output is correct
13 Correct 62 ms 139856 KB Output is correct
14 Correct 64 ms 139628 KB Output is correct
15 Correct 64 ms 139604 KB Output is correct
16 Correct 78 ms 139596 KB Output is correct
17 Correct 61 ms 139768 KB Output is correct
18 Correct 64 ms 139764 KB Output is correct
19 Correct 64 ms 139596 KB Output is correct
20 Correct 63 ms 139600 KB Output is correct
21 Correct 64 ms 139864 KB Output is correct
22 Correct 76 ms 139572 KB Output is correct
23 Correct 76 ms 139780 KB Output is correct
24 Correct 69 ms 139560 KB Output is correct
25 Correct 70 ms 139604 KB Output is correct
26 Correct 78 ms 139624 KB Output is correct
27 Correct 70 ms 139604 KB Output is correct
28 Correct 71 ms 139604 KB Output is correct
29 Correct 73 ms 139604 KB Output is correct
30 Correct 73 ms 139604 KB Output is correct
31 Correct 77 ms 139688 KB Output is correct
32 Correct 70 ms 139700 KB Output is correct
33 Correct 70 ms 139788 KB Output is correct
34 Correct 72 ms 139704 KB Output is correct
35 Correct 70 ms 139636 KB Output is correct
36 Correct 71 ms 139604 KB Output is correct
37 Correct 71 ms 139604 KB Output is correct
38 Correct 71 ms 139604 KB Output is correct
39 Correct 69 ms 139808 KB Output is correct
40 Correct 62 ms 139880 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 139768 KB Output is correct
2 Correct 62 ms 139604 KB Output is correct
3 Correct 61 ms 139600 KB Output is correct
4 Correct 61 ms 139604 KB Output is correct
5 Correct 63 ms 139536 KB Output is correct
6 Correct 63 ms 139600 KB Output is correct
7 Correct 69 ms 139668 KB Output is correct
8 Correct 64 ms 139760 KB Output is correct
9 Correct 63 ms 139768 KB Output is correct
10 Correct 63 ms 139764 KB Output is correct
11 Correct 64 ms 139704 KB Output is correct
12 Correct 67 ms 139600 KB Output is correct
13 Correct 62 ms 139856 KB Output is correct
14 Correct 64 ms 139628 KB Output is correct
15 Correct 64 ms 139604 KB Output is correct
16 Correct 78 ms 139596 KB Output is correct
17 Correct 61 ms 139768 KB Output is correct
18 Correct 64 ms 139764 KB Output is correct
19 Correct 64 ms 139596 KB Output is correct
20 Correct 63 ms 139600 KB Output is correct
21 Correct 64 ms 139864 KB Output is correct
22 Correct 76 ms 139572 KB Output is correct
23 Correct 76 ms 139780 KB Output is correct
24 Correct 69 ms 139560 KB Output is correct
25 Correct 70 ms 139604 KB Output is correct
26 Correct 78 ms 139624 KB Output is correct
27 Correct 70 ms 139604 KB Output is correct
28 Correct 71 ms 139604 KB Output is correct
29 Correct 73 ms 139604 KB Output is correct
30 Correct 73 ms 139604 KB Output is correct
31 Correct 77 ms 139688 KB Output is correct
32 Correct 70 ms 139700 KB Output is correct
33 Correct 70 ms 139788 KB Output is correct
34 Correct 72 ms 139704 KB Output is correct
35 Correct 70 ms 139636 KB Output is correct
36 Correct 71 ms 139604 KB Output is correct
37 Correct 71 ms 139604 KB Output is correct
38 Correct 71 ms 139604 KB Output is correct
39 Correct 69 ms 139808 KB Output is correct
40 Correct 62 ms 139880 KB Output is correct
41 Correct 121 ms 143564 KB Output is correct
42 Correct 132 ms 141400 KB Output is correct
43 Correct 123 ms 141392 KB Output is correct
44 Correct 125 ms 141368 KB Output is correct
45 Correct 127 ms 141392 KB Output is correct
46 Correct 199 ms 142920 KB Output is correct
47 Correct 201 ms 142924 KB Output is correct
48 Correct 207 ms 143116 KB Output is correct
49 Correct 212 ms 142932 KB Output is correct
50 Correct 129 ms 140368 KB Output is correct
51 Correct 137 ms 140368 KB Output is correct
52 Correct 132 ms 140116 KB Output is correct
53 Correct 166 ms 140880 KB Output is correct
54 Correct 175 ms 140884 KB Output is correct
55 Correct 170 ms 140920 KB Output is correct
56 Correct 74 ms 139860 KB Output is correct
57 Correct 70 ms 143216 KB Output is correct
58 Correct 101 ms 155220 KB Output is correct
59 Correct 186 ms 157008 KB Output is correct
60 Correct 129 ms 143824 KB Output is correct
61 Correct 139 ms 143496 KB Output is correct