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Submission #689919

# Submission time Handle Problem Language Result Execution time Memory
689919 2023-01-29T18:40:33 Z Darren0724 Cat in a tree (BOI17_catinatree) C++17
100 / 100
 111 ms 37048 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
int n,r;
vector<vector<int>> adj;
vector<multiset<int>> v;
vector<int> dp;
void dfs(int k,int d){
    int big=n;
    for(int j:adj[k]){
        dfs(j,d+1);
        if(v[big].size()<v[j].size()){
            big=j;
        }
        dp[k]+=dp[j];
    }
    swap(v[k],v[big]);
    for(int j:adj[k]){
        if(j==big){
            continue;
        }
        for(int i:v[j]){
            v[k].insert(i);
        }
    }
    while(v[k].size()){
        int a=*v[k].rbegin();
        if(a>=d+r){
            dp[k]++;
            v[k].erase(v[k].find(a));
        }
        else{
            break;
        }
    }
    while(v[k].size()>=2){
        int a,b;
        auto it=v[k].begin();
        a=*it;
        it++;
        b=*it;
        if(a+b-d*2<r){
            v[k].erase(v[k].find(a));
        }
        else{
            break;
        }
    }
    if(v[k].size()==0){
        v[k].insert(d);
    }
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>r;
    v.resize(n+1);
    adj.resize(n);
    dp.resize(n+1);
    for(int i=1;i<n;i++){
        int p;cin>>p;
        adj[p].push_back(i);
    }
    dfs(0,0);
    cout<<dp[0]+v[0].size()<<endl;
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 320 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 320 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 584 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 320 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 452 KB Output is correct
28 Correct 1 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 468 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 468 KB Output is correct
34 Correct 1 ms 456 KB Output is correct
35 Correct 1 ms 468 KB Output is correct
36 Correct 1 ms 468 KB Output is correct
37 Correct 1 ms 452 KB Output is correct
38 Correct 1 ms 468 KB Output is correct
39 Correct 1 ms 468 KB Output is correct
40 Correct 1 ms 640 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 320 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 584 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 320 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 452 KB Output is correct
28 Correct 1 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 468 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 468 KB Output is correct
34 Correct 1 ms 456 KB Output is correct
35 Correct 1 ms 468 KB Output is correct
36 Correct 1 ms 468 KB Output is correct
37 Correct 1 ms 452 KB Output is correct
38 Correct 1 ms 468 KB Output is correct
39 Correct 1 ms 468 KB Output is correct
40 Correct 1 ms 640 KB Output is correct
41 Correct 59 ms 26056 KB Output is correct
42 Correct 44 ms 12960 KB Output is correct
43 Correct 46 ms 12936 KB Output is correct
44 Correct 41 ms 12840 KB Output is correct
45 Correct 43 ms 12824 KB Output is correct
46 Correct 98 ms 25888 KB Output is correct
47 Correct 94 ms 25552 KB Output is correct
48 Correct 91 ms 25548 KB Output is correct
49 Correct 111 ms 25576 KB Output is correct
50 Correct 39 ms 14156 KB Output is correct
51 Correct 38 ms 14156 KB Output is correct
52 Correct 39 ms 14196 KB Output is correct
53 Correct 84 ms 28120 KB Output is correct
54 Correct 94 ms 28064 KB Output is correct
55 Correct 85 ms 28112 KB Output is correct
56 Correct 2 ms 708 KB Output is correct
57 Correct 6 ms 4948 KB Output is correct
58 Correct 29 ms 21860 KB Output is correct
59 Correct 78 ms 37048 KB Output is correct
60 Correct 58 ms 25964 KB Output is correct
61 Correct 62 ms 23512 KB Output is correct