oj.uz

Submission #916521

# Submission time Handle Problem Language Result Execution time Memory
916521 2024-01-26T03:47:45 Z Darren0724 Cat Exercise (JOI23_ho_t4) C++17
41 / 100
 205 ms 192424 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define all(x) x.begin(),x.end()
#define abcorz ios_base::sync_with_stdio(false);cin.tie(0);
const int N=400005;
const int K=20;
int n;
vector<int> v(N),deep(N);
struct sparse_table{
    vector<vector<int>> mx;
    int cmp(int i,int j){
        return (v[i]>v[j]?i:j);
    }
    void init(vector<int> &track){
        mx.resize(K,vector<int>(N));
        int n=track.size();
        for(int i=0;i<n;i++){
            mx[0][i]=track[i];
        }
        for(int i=1;i<K;i++){
            for(int j=0;j+(1<<i)<=n;j++){
                mx[i][j]=cmp(mx[i-1][j],mx[i-1][j+(1<<(i-1))]);
            }
        }
    }
    int ask(int l,int r){
        int p=__lg(r-l);
        return cmp(mx[p][l],mx[p][r-(1<<p)]);
    }
}sp;
struct sparse_table1{
    vector<vector<int>> mx;
    int cmp(int i,int j){
        return (deep[i]<deep[j]?i:j);
    }
    void init(vector<int> &track){
        mx.resize(K,vector<int>(N));
        int n=track.size();
        for(int i=0;i<n;i++){
            mx[0][i]=track[i];
        }
        for(int i=1;i<K;i++){
            for(int j=0;j+(1<<i)<=n;j++){
                mx[i][j]=cmp(mx[i-1][j],mx[i-1][j+(1<<(i-1))]);
            }
        }
    }
    int ask(int l,int r){
        int p=__lg(r-l);
        return cmp(mx[p][l],mx[p][r-(1<<p)]);
    }
}sp1;
vector<int> adj[N];
vector<int> track,in(N);
vector<int> tr[N];

void dfs(int k,int pa){
    in[k]=track.size();
    tr[k].push_back(track.size());
    track.push_back(k);
    for(int j:adj[k]){
        if(j==pa)continue;
        deep[j]=deep[k]+1;
        dfs(j,k);
        tr[k].push_back(track.size());
        track.push_back(k);
    }
}
int dis(int a,int b){
    if(in[a]>in[b])swap(a,b);
    int lca=sp1.ask(in[a],in[b]+1);
    return deep[a]+deep[b]-2*deep[lca];
}



int dc(int l,int r,int rec){
    if(r<=l){
        return 0;
    }
    int p=sp.ask(l,r);
    if(rec==-1)rec=p;
    int mx=0;
    int last=l-1;
    for(int j:tr[p]){
        if(j<l||j>r){
            continue;
        }
        mx=max(mx,dc(last+1,j,p));
        last=j;
    }
    mx=max(mx,dc(last+1,r,p));
    return dis(rec,p)+mx;
}


int32_t main(){
    abcorz;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>v[i];
    }
    for(int i=1;i<n;i++){
        int a,b;cin>>a>>b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    dfs(1,1);
    sp.init(track);
    sp1.init(track);
    cout<<dc(0,track.size(),-1)<<endl;
    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 156956 KB Output is correct
2 Correct 50 ms 156956 KB Output is correct
3 Correct 54 ms 156956 KB Output is correct
4 Correct 52 ms 156952 KB Output is correct
5 Correct 52 ms 156956 KB Output is correct
6 Correct 50 ms 157020 KB Output is correct
7 Correct 51 ms 156960 KB Output is correct
8 Correct 56 ms 157016 KB Output is correct
9 Correct 51 ms 156952 KB Output is correct
10 Correct 51 ms 156920 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 156956 KB Output is correct
2 Correct 50 ms 156956 KB Output is correct
3 Correct 54 ms 156956 KB Output is correct
4 Correct 52 ms 156952 KB Output is correct
5 Correct 52 ms 156956 KB Output is correct
6 Correct 50 ms 157020 KB Output is correct
7 Correct 51 ms 156960 KB Output is correct
8 Correct 56 ms 157016 KB Output is correct
9 Correct 51 ms 156952 KB Output is correct
10 Correct 51 ms 156920 KB Output is correct
11 Correct 52 ms 157208 KB Output is correct
12 Correct 52 ms 156952 KB Output is correct
13 Correct 52 ms 156952 KB Output is correct
14 Correct 51 ms 156952 KB Output is correct
15 Correct 56 ms 156984 KB Output is correct
16 Correct 52 ms 157140 KB Output is correct
17 Correct 53 ms 156956 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 156956 KB Output is correct
2 Correct 50 ms 156956 KB Output is correct
3 Correct 54 ms 156956 KB Output is correct
4 Correct 52 ms 156952 KB Output is correct
5 Correct 52 ms 156956 KB Output is correct
6 Correct 50 ms 157020 KB Output is correct
7 Correct 51 ms 156960 KB Output is correct
8 Correct 56 ms 157016 KB Output is correct
9 Correct 51 ms 156952 KB Output is correct
10 Correct 51 ms 156920 KB Output is correct
11 Correct 52 ms 157208 KB Output is correct
12 Correct 52 ms 156952 KB Output is correct
13 Correct 52 ms 156952 KB Output is correct
14 Correct 51 ms 156952 KB Output is correct
15 Correct 56 ms 156984 KB Output is correct
16 Correct 52 ms 157140 KB Output is correct
17 Correct 53 ms 156956 KB Output is correct
18 Correct 55 ms 158232 KB Output is correct
19 Correct 56 ms 157984 KB Output is correct
20 Correct 54 ms 157976 KB Output is correct
21 Correct 55 ms 157972 KB Output is correct
22 Correct 53 ms 157980 KB Output is correct
23 Correct 54 ms 157976 KB Output is correct
24 Correct 61 ms 157876 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 156956 KB Output is correct
2 Correct 50 ms 156956 KB Output is correct
3 Correct 54 ms 156956 KB Output is correct
4 Correct 52 ms 156952 KB Output is correct
5 Correct 52 ms 156956 KB Output is correct
6 Correct 50 ms 157020 KB Output is correct
7 Correct 51 ms 156960 KB Output is correct
8 Correct 56 ms 157016 KB Output is correct
9 Correct 51 ms 156952 KB Output is correct
10 Correct 51 ms 156920 KB Output is correct
11 Correct 52 ms 157208 KB Output is correct
12 Correct 52 ms 156952 KB Output is correct
13 Correct 52 ms 156952 KB Output is correct
14 Correct 51 ms 156952 KB Output is correct
15 Correct 56 ms 156984 KB Output is correct
16 Correct 52 ms 157140 KB Output is correct
17 Correct 53 ms 156956 KB Output is correct
18 Correct 55 ms 158232 KB Output is correct
19 Correct 56 ms 157984 KB Output is correct
20 Correct 54 ms 157976 KB Output is correct
21 Correct 55 ms 157972 KB Output is correct
22 Correct 53 ms 157980 KB Output is correct
23 Correct 54 ms 157976 KB Output is correct
24 Correct 61 ms 157876 KB Output is correct
25 Correct 51 ms 156952 KB Output is correct
26 Correct 55 ms 157720 KB Output is correct
27 Correct 56 ms 157724 KB Output is correct
28 Correct 56 ms 157724 KB Output is correct
29 Correct 55 ms 157704 KB Output is correct
30 Incorrect 55 ms 157464 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 156956 KB Output is correct
2 Correct 50 ms 156956 KB Output is correct
3 Correct 54 ms 156956 KB Output is correct
4 Correct 52 ms 156952 KB Output is correct
5 Correct 52 ms 156956 KB Output is correct
6 Correct 50 ms 157020 KB Output is correct
7 Correct 51 ms 156960 KB Output is correct
8 Correct 56 ms 157016 KB Output is correct
9 Correct 51 ms 156952 KB Output is correct
10 Correct 51 ms 156920 KB Output is correct
11 Correct 52 ms 157208 KB Output is correct
12 Correct 52 ms 156952 KB Output is correct
13 Correct 52 ms 156952 KB Output is correct
14 Correct 51 ms 156952 KB Output is correct
15 Correct 56 ms 156984 KB Output is correct
16 Correct 52 ms 157140 KB Output is correct
17 Correct 53 ms 156956 KB Output is correct
18 Correct 55 ms 158232 KB Output is correct
19 Correct 56 ms 157984 KB Output is correct
20 Correct 54 ms 157976 KB Output is correct
21 Correct 55 ms 157972 KB Output is correct
22 Correct 53 ms 157980 KB Output is correct
23 Correct 54 ms 157976 KB Output is correct
24 Correct 61 ms 157876 KB Output is correct
25 Correct 169 ms 191620 KB Output is correct
26 Correct 172 ms 191356 KB Output is correct
27 Correct 174 ms 191416 KB Output is correct
28 Correct 186 ms 191364 KB Output is correct
29 Correct 202 ms 192176 KB Output is correct
30 Correct 186 ms 192424 KB Output is correct
31 Correct 205 ms 191572 KB Output is correct

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 156980 KB Output is correct
2 Incorrect 51 ms 156956 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 156956 KB Output is correct
2 Correct 50 ms 156956 KB Output is correct
3 Correct 54 ms 156956 KB Output is correct
4 Correct 52 ms 156952 KB Output is correct
5 Correct 52 ms 156956 KB Output is correct
6 Correct 50 ms 157020 KB Output is correct
7 Correct 51 ms 156960 KB Output is correct
8 Correct 56 ms 157016 KB Output is correct
9 Correct 51 ms 156952 KB Output is correct
10 Correct 51 ms 156920 KB Output is correct
11 Correct 52 ms 157208 KB Output is correct
12 Correct 52 ms 156952 KB Output is correct
13 Correct 52 ms 156952 KB Output is correct
14 Correct 51 ms 156952 KB Output is correct
15 Correct 56 ms 156984 KB Output is correct
16 Correct 52 ms 157140 KB Output is correct
17 Correct 53 ms 156956 KB Output is correct
18 Correct 55 ms 158232 KB Output is correct
19 Correct 56 ms 157984 KB Output is correct
20 Correct 54 ms 157976 KB Output is correct
21 Correct 55 ms 157972 KB Output is correct
22 Correct 53 ms 157980 KB Output is correct
23 Correct 54 ms 157976 KB Output is correct
24 Correct 61 ms 157876 KB Output is correct
25 Correct 51 ms 156952 KB Output is correct
26 Correct 55 ms 157720 KB Output is correct
27 Correct 56 ms 157724 KB Output is correct
28 Correct 56 ms 157724 KB Output is correct
29 Correct 55 ms 157704 KB Output is correct
30 Incorrect 55 ms 157464 KB Output isn't correct
31 Halted 0 ms 0 KB -