oj.uz

Submission #1111126

# Submission time Handle Problem Language Result Execution time Memory
1111126 2024-11-11T14:49:15 Z Luvidi Cat Exercise (JOI23_ho_t4) C++17
100 / 100
 283 ms 46472 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long

const int maxn=2e5;
vector<int> adj[maxn];
int sp[maxn][20],dt[maxn],par[maxn];

void dfs(int v,int p){
    for(int u:adj[v])if(u!=p){
        dt[u]=dt[v]+1;
        sp[u][0]=v;
        dfs(u,v);
    }
}

int lca(int v1,int v2){
    for(int i=19;i>-1;i--){
        if(dt[v1]-(1<<i)>=dt[v2])v1=sp[v1][i];
        if(dt[v2]-(1<<i)>=dt[v1])v2=sp[v2][i];
    }
    for(int i=19;i>-1;i--){
        if(sp[v1][i]!=sp[v2][i]){
            v1=sp[v1][i];
            v2=sp[v2][i];
        }
    }
    if(v1!=v2)v1=sp[v1][0];
    return v1;
}

ll dist(int v1,int v2){
    int x=lca(v1,v2);
    return dt[v1]+dt[v2]-2*dt[x];
}

int rep(int v){
    if(v==par[v])return v;
    return par[v]=rep(par[v]);
}

void join(int x,int y){
    x=rep(x);y=rep(y);
    par[x]=y;
}

int main(){
    int n;
    cin>>n;
    int p[n];
    for(int i=0;i<n;i++)cin>>p[i];
    for(int i=0;i<n-1;i++){
        int u,v;
        cin>>u>>v;
        adj[--u].push_back(--v);
        adj[v].push_back(u);
    }
    int idx[n+1];
    for(int i=0;i<n;i++)idx[p[i]]=i;
    dfs(0,0);
    for(int i=1;i<20;i++){
        for(int j=0;j<n;j++){
            sp[j][i]=sp[sp[j][i-1]][i-1];
        }
    }
    iota(par,par+n,0);
    ll dp[n+1];
    for(int i=1;i<=n;i++){
        dp[i]=0;
        int v=idx[i];
        for(int u:adj[v])if(p[u]<p[v]){
            u=rep(u);
            join(u,v);
            dp[i]=max(dp[i],dp[p[u]]+dist(u,v));
        }
    }
    cout<<dp[n]<<'\n';
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 2 ms 5712 KB Output is correct
3 Correct 2 ms 5712 KB Output is correct
4 Correct 2 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5884 KB Output is correct
7 Correct 2 ms 5712 KB Output is correct
8 Correct 2 ms 5712 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 2 ms 5712 KB Output is correct
3 Correct 2 ms 5712 KB Output is correct
4 Correct 2 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5884 KB Output is correct
7 Correct 2 ms 5712 KB Output is correct
8 Correct 2 ms 5712 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 2 ms 5884 KB Output is correct
12 Correct 2 ms 5712 KB Output is correct
13 Correct 3 ms 5712 KB Output is correct
14 Correct 2 ms 5712 KB Output is correct
15 Correct 2 ms 5712 KB Output is correct
16 Correct 2 ms 5712 KB Output is correct
17 Correct 2 ms 5712 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 2 ms 5712 KB Output is correct
3 Correct 2 ms 5712 KB Output is correct
4 Correct 2 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5884 KB Output is correct
7 Correct 2 ms 5712 KB Output is correct
8 Correct 2 ms 5712 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 2 ms 5884 KB Output is correct
12 Correct 2 ms 5712 KB Output is correct
13 Correct 3 ms 5712 KB Output is correct
14 Correct 2 ms 5712 KB Output is correct
15 Correct 2 ms 5712 KB Output is correct
16 Correct 2 ms 5712 KB Output is correct
17 Correct 2 ms 5712 KB Output is correct
18 Correct 8 ms 6480 KB Output is correct
19 Correct 6 ms 6480 KB Output is correct
20 Correct 6 ms 6644 KB Output is correct
21 Correct 7 ms 6480 KB Output is correct
22 Correct 7 ms 6480 KB Output is correct
23 Correct 6 ms 6480 KB Output is correct
24 Correct 6 ms 6480 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 2 ms 5712 KB Output is correct
3 Correct 2 ms 5712 KB Output is correct
4 Correct 2 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5884 KB Output is correct
7 Correct 2 ms 5712 KB Output is correct
8 Correct 2 ms 5712 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 2 ms 5884 KB Output is correct
12 Correct 2 ms 5712 KB Output is correct
13 Correct 3 ms 5712 KB Output is correct
14 Correct 2 ms 5712 KB Output is correct
15 Correct 2 ms 5712 KB Output is correct
16 Correct 2 ms 5712 KB Output is correct
17 Correct 2 ms 5712 KB Output is correct
18 Correct 8 ms 6480 KB Output is correct
19 Correct 6 ms 6480 KB Output is correct
20 Correct 6 ms 6644 KB Output is correct
21 Correct 7 ms 6480 KB Output is correct
22 Correct 7 ms 6480 KB Output is correct
23 Correct 6 ms 6480 KB Output is correct
24 Correct 6 ms 6480 KB Output is correct
25 Correct 3 ms 5712 KB Output is correct
26 Correct 7 ms 6480 KB Output is correct
27 Correct 6 ms 6480 KB Output is correct
28 Correct 6 ms 6480 KB Output is correct
29 Correct 7 ms 6480 KB Output is correct
30 Correct 7 ms 6332 KB Output is correct
31 Correct 6 ms 6392 KB Output is correct
32 Correct 6 ms 6224 KB Output is correct
33 Correct 5 ms 6224 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 2 ms 5712 KB Output is correct
3 Correct 2 ms 5712 KB Output is correct
4 Correct 2 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5884 KB Output is correct
7 Correct 2 ms 5712 KB Output is correct
8 Correct 2 ms 5712 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 2 ms 5884 KB Output is correct
12 Correct 2 ms 5712 KB Output is correct
13 Correct 3 ms 5712 KB Output is correct
14 Correct 2 ms 5712 KB Output is correct
15 Correct 2 ms 5712 KB Output is correct
16 Correct 2 ms 5712 KB Output is correct
17 Correct 2 ms 5712 KB Output is correct
18 Correct 8 ms 6480 KB Output is correct
19 Correct 6 ms 6480 KB Output is correct
20 Correct 6 ms 6644 KB Output is correct
21 Correct 7 ms 6480 KB Output is correct
22 Correct 7 ms 6480 KB Output is correct
23 Correct 6 ms 6480 KB Output is correct
24 Correct 6 ms 6480 KB Output is correct
25 Correct 180 ms 42568 KB Output is correct
26 Correct 166 ms 46408 KB Output is correct
27 Correct 169 ms 46344 KB Output is correct
28 Correct 185 ms 46472 KB Output is correct
29 Correct 217 ms 46320 KB Output is correct
30 Correct 192 ms 46408 KB Output is correct
31 Correct 204 ms 46408 KB Output is correct

Subtask #6
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 3 ms 5712 KB Output is correct
3 Correct 212 ms 31624 KB Output is correct
4 Correct 224 ms 35400 KB Output is correct
5 Correct 215 ms 35400 KB Output is correct

Subtask #7
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 2 ms 5712 KB Output is correct
3 Correct 2 ms 5712 KB Output is correct
4 Correct 2 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5884 KB Output is correct
7 Correct 2 ms 5712 KB Output is correct
8 Correct 2 ms 5712 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 2 ms 5884 KB Output is correct
12 Correct 2 ms 5712 KB Output is correct
13 Correct 3 ms 5712 KB Output is correct
14 Correct 2 ms 5712 KB Output is correct
15 Correct 2 ms 5712 KB Output is correct
16 Correct 2 ms 5712 KB Output is correct
17 Correct 2 ms 5712 KB Output is correct
18 Correct 8 ms 6480 KB Output is correct
19 Correct 6 ms 6480 KB Output is correct
20 Correct 6 ms 6644 KB Output is correct
21 Correct 7 ms 6480 KB Output is correct
22 Correct 7 ms 6480 KB Output is correct
23 Correct 6 ms 6480 KB Output is correct
24 Correct 6 ms 6480 KB Output is correct
25 Correct 3 ms 5712 KB Output is correct
26 Correct 7 ms 6480 KB Output is correct
27 Correct 6 ms 6480 KB Output is correct
28 Correct 6 ms 6480 KB Output is correct
29 Correct 7 ms 6480 KB Output is correct
30 Correct 7 ms 6332 KB Output is correct
31 Correct 6 ms 6392 KB Output is correct
32 Correct 6 ms 6224 KB Output is correct
33 Correct 5 ms 6224 KB Output is correct
34 Correct 180 ms 42568 KB Output is correct
35 Correct 166 ms 46408 KB Output is correct
36 Correct 169 ms 46344 KB Output is correct
37 Correct 185 ms 46472 KB Output is correct
38 Correct 217 ms 46320 KB Output is correct
39 Correct 192 ms 46408 KB Output is correct
40 Correct 204 ms 46408 KB Output is correct
41 Correct 2 ms 5712 KB Output is correct
42 Correct 3 ms 5712 KB Output is correct
43 Correct 212 ms 31624 KB Output is correct
44 Correct 224 ms 35400 KB Output is correct
45 Correct 215 ms 35400 KB Output is correct
46 Correct 262 ms 40692 KB Output is correct
47 Correct 234 ms 39752 KB Output is correct
48 Correct 283 ms 41288 KB Output is correct
49 Correct 210 ms 39752 KB Output is correct
50 Correct 234 ms 35408 KB Output is correct
51 Correct 208 ms 35448 KB Output is correct
52 Correct 261 ms 35576 KB Output is correct
53 Correct 271 ms 35576 KB Output is correct