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Submission #925391

# Submission time Handle Problem Language Result Execution time Memory
925391 2024-02-11T14:19:17 Z ttamx Cat in a tree (BOI17_catinatree) C++14
100 / 100
 220 ms 158188 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+1){
        dp[u][0]=max(dp[u][0],dp[u][d]+1);
        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+1){
      |        ~~~~~~~~~~~~^~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 139600 KB Output is correct
2 Correct 63 ms 139748 KB Output is correct
3 Correct 63 ms 139604 KB Output is correct
4 Correct 62 ms 139600 KB Output is correct
5 Correct 66 ms 140216 KB Output is correct
6 Correct 65 ms 139600 KB Output is correct
7 Correct 65 ms 139604 KB Output is correct
8 Correct 63 ms 139604 KB Output is correct
9 Correct 64 ms 139668 KB Output is correct
10 Correct 65 ms 139600 KB Output is correct
11 Correct 69 ms 139704 KB Output is correct
12 Correct 63 ms 139600 KB Output is correct
13 Correct 71 ms 139600 KB Output is correct
14 Correct 63 ms 139752 KB Output is correct
15 Correct 63 ms 139768 KB Output is correct
16 Correct 68 ms 139604 KB Output is correct
17 Correct 63 ms 139600 KB Output is correct
18 Correct 65 ms 139600 KB Output is correct
19 Correct 64 ms 139600 KB Output is correct
20 Correct 62 ms 139648 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 139600 KB Output is correct
2 Correct 63 ms 139748 KB Output is correct
3 Correct 63 ms 139604 KB Output is correct
4 Correct 62 ms 139600 KB Output is correct
5 Correct 66 ms 140216 KB Output is correct
6 Correct 65 ms 139600 KB Output is correct
7 Correct 65 ms 139604 KB Output is correct
8 Correct 63 ms 139604 KB Output is correct
9 Correct 64 ms 139668 KB Output is correct
10 Correct 65 ms 139600 KB Output is correct
11 Correct 69 ms 139704 KB Output is correct
12 Correct 63 ms 139600 KB Output is correct
13 Correct 71 ms 139600 KB Output is correct
14 Correct 63 ms 139752 KB Output is correct
15 Correct 63 ms 139768 KB Output is correct
16 Correct 68 ms 139604 KB Output is correct
17 Correct 63 ms 139600 KB Output is correct
18 Correct 65 ms 139600 KB Output is correct
19 Correct 64 ms 139600 KB Output is correct
20 Correct 62 ms 139648 KB Output is correct
21 Correct 65 ms 139860 KB Output is correct
22 Correct 70 ms 139604 KB Output is correct
23 Correct 68 ms 139604 KB Output is correct
24 Correct 69 ms 139600 KB Output is correct
25 Correct 69 ms 140012 KB Output is correct
26 Correct 68 ms 139636 KB Output is correct
27 Correct 69 ms 139600 KB Output is correct
28 Correct 70 ms 139604 KB Output is correct
29 Correct 73 ms 139600 KB Output is correct
30 Correct 74 ms 139604 KB Output is correct
31 Correct 69 ms 139600 KB Output is correct
32 Correct 71 ms 139764 KB Output is correct
33 Correct 69 ms 139604 KB Output is correct
34 Correct 67 ms 139792 KB Output is correct
35 Correct 75 ms 139784 KB Output is correct
36 Correct 71 ms 139600 KB Output is correct
37 Correct 71 ms 139604 KB Output is correct
38 Correct 70 ms 139608 KB Output is correct
39 Correct 78 ms 139864 KB Output is correct
40 Correct 72 ms 140376 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 139600 KB Output is correct
2 Correct 63 ms 139748 KB Output is correct
3 Correct 63 ms 139604 KB Output is correct
4 Correct 62 ms 139600 KB Output is correct
5 Correct 66 ms 140216 KB Output is correct
6 Correct 65 ms 139600 KB Output is correct
7 Correct 65 ms 139604 KB Output is correct
8 Correct 63 ms 139604 KB Output is correct
9 Correct 64 ms 139668 KB Output is correct
10 Correct 65 ms 139600 KB Output is correct
11 Correct 69 ms 139704 KB Output is correct
12 Correct 63 ms 139600 KB Output is correct
13 Correct 71 ms 139600 KB Output is correct
14 Correct 63 ms 139752 KB Output is correct
15 Correct 63 ms 139768 KB Output is correct
16 Correct 68 ms 139604 KB Output is correct
17 Correct 63 ms 139600 KB Output is correct
18 Correct 65 ms 139600 KB Output is correct
19 Correct 64 ms 139600 KB Output is correct
20 Correct 62 ms 139648 KB Output is correct
21 Correct 65 ms 139860 KB Output is correct
22 Correct 70 ms 139604 KB Output is correct
23 Correct 68 ms 139604 KB Output is correct
24 Correct 69 ms 139600 KB Output is correct
25 Correct 69 ms 140012 KB Output is correct
26 Correct 68 ms 139636 KB Output is correct
27 Correct 69 ms 139600 KB Output is correct
28 Correct 70 ms 139604 KB Output is correct
29 Correct 73 ms 139600 KB Output is correct
30 Correct 74 ms 139604 KB Output is correct
31 Correct 69 ms 139600 KB Output is correct
32 Correct 71 ms 139764 KB Output is correct
33 Correct 69 ms 139604 KB Output is correct
34 Correct 67 ms 139792 KB Output is correct
35 Correct 75 ms 139784 KB Output is correct
36 Correct 71 ms 139600 KB Output is correct
37 Correct 71 ms 139604 KB Output is correct
38 Correct 70 ms 139608 KB Output is correct
39 Correct 78 ms 139864 KB Output is correct
40 Correct 72 ms 140376 KB Output is correct
41 Correct 121 ms 144384 KB Output is correct
42 Correct 125 ms 141940 KB Output is correct
43 Correct 157 ms 141904 KB Output is correct
44 Correct 142 ms 141944 KB Output is correct
45 Correct 125 ms 141948 KB Output is correct
46 Correct 220 ms 144168 KB Output is correct
47 Correct 220 ms 144208 KB Output is correct
48 Correct 201 ms 143952 KB Output is correct
49 Correct 202 ms 143952 KB Output is correct
50 Correct 117 ms 140704 KB Output is correct
51 Correct 119 ms 140628 KB Output is correct
52 Correct 114 ms 140732 KB Output is correct
53 Correct 163 ms 141668 KB Output is correct
54 Correct 173 ms 141616 KB Output is correct
55 Correct 161 ms 141652 KB Output is correct
56 Correct 73 ms 139756 KB Output is correct
57 Correct 66 ms 143280 KB Output is correct
58 Correct 99 ms 155812 KB Output is correct
59 Correct 157 ms 158188 KB Output is correct
60 Correct 129 ms 144848 KB Output is correct
61 Correct 126 ms 144720 KB Output is correct