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Submission #1111119

# Submission time Handle Problem Language Result Execution time Memory
1111119 2024-11-11T14:32:26 Z Luvidi Cat Exercise (JOI23_ho_t4) C++17
31 / 100
 2000 ms 46460 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])join(u,v);
        for(int u=0;u<n;u++){
            if(u!=v&&rep(u)==rep(v)){
                // cout<<u<<' '<<v<<'\n';
                dp[i]=max(dp[i],dp[p[u]]+dist(u,v));
            }
        }
        // cout<<i<<' '<<dp[i]<<'\n';
    }
    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 5588 KB Output is correct
3 Correct 3 ms 5712 KB Output is correct
4 Correct 3 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5712 KB Output is correct
7 Correct 3 ms 5880 KB Output is correct
8 Correct 2 ms 5720 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 5588 KB Output is correct
3 Correct 3 ms 5712 KB Output is correct
4 Correct 3 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5712 KB Output is correct
7 Correct 3 ms 5880 KB Output is correct
8 Correct 2 ms 5720 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 7 ms 5712 KB Output is correct
12 Correct 6 ms 5712 KB Output is correct
13 Correct 6 ms 5712 KB Output is correct
14 Correct 3 ms 5712 KB Output is correct
15 Correct 3 ms 5712 KB Output is correct
16 Correct 3 ms 5944 KB Output is correct
17 Correct 4 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 5588 KB Output is correct
3 Correct 3 ms 5712 KB Output is correct
4 Correct 3 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5712 KB Output is correct
7 Correct 3 ms 5880 KB Output is correct
8 Correct 2 ms 5720 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 7 ms 5712 KB Output is correct
12 Correct 6 ms 5712 KB Output is correct
13 Correct 6 ms 5712 KB Output is correct
14 Correct 3 ms 5712 KB Output is correct
15 Correct 3 ms 5712 KB Output is correct
16 Correct 3 ms 5944 KB Output is correct
17 Correct 4 ms 5712 KB Output is correct
18 Correct 1302 ms 6540 KB Output is correct
19 Correct 1183 ms 6768 KB Output is correct
20 Correct 1188 ms 6772 KB Output is correct
21 Correct 45 ms 6736 KB Output is correct
22 Correct 46 ms 6736 KB Output is correct
23 Correct 48 ms 6736 KB Output is correct
24 Correct 46 ms 6736 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 5588 KB Output is correct
3 Correct 3 ms 5712 KB Output is correct
4 Correct 3 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5712 KB Output is correct
7 Correct 3 ms 5880 KB Output is correct
8 Correct 2 ms 5720 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 7 ms 5712 KB Output is correct
12 Correct 6 ms 5712 KB Output is correct
13 Correct 6 ms 5712 KB Output is correct
14 Correct 3 ms 5712 KB Output is correct
15 Correct 3 ms 5712 KB Output is correct
16 Correct 3 ms 5944 KB Output is correct
17 Correct 4 ms 5712 KB Output is correct
18 Correct 1302 ms 6540 KB Output is correct
19 Correct 1183 ms 6768 KB Output is correct
20 Correct 1188 ms 6772 KB Output is correct
21 Correct 45 ms 6736 KB Output is correct
22 Correct 46 ms 6736 KB Output is correct
23 Correct 48 ms 6736 KB Output is correct
24 Correct 46 ms 6736 KB Output is correct
25 Correct 2 ms 5712 KB Output is correct
26 Correct 1208 ms 6620 KB Output is correct
27 Correct 1170 ms 6660 KB Output is correct
28 Correct 1292 ms 6608 KB Output is correct
29 Correct 1210 ms 6692 KB Output is correct
30 Correct 105 ms 6480 KB Output is correct
31 Correct 123 ms 6496 KB Output is correct
32 Correct 108 ms 6480 KB Output is correct
33 Correct 112 ms 6480 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 2 ms 5588 KB Output is correct
3 Correct 3 ms 5712 KB Output is correct
4 Correct 3 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5712 KB Output is correct
7 Correct 3 ms 5880 KB Output is correct
8 Correct 2 ms 5720 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 7 ms 5712 KB Output is correct
12 Correct 6 ms 5712 KB Output is correct
13 Correct 6 ms 5712 KB Output is correct
14 Correct 3 ms 5712 KB Output is correct
15 Correct 3 ms 5712 KB Output is correct
16 Correct 3 ms 5944 KB Output is correct
17 Correct 4 ms 5712 KB Output is correct
18 Correct 1302 ms 6540 KB Output is correct
19 Correct 1183 ms 6768 KB Output is correct
20 Correct 1188 ms 6772 KB Output is correct
21 Correct 45 ms 6736 KB Output is correct
22 Correct 46 ms 6736 KB Output is correct
23 Correct 48 ms 6736 KB Output is correct
24 Correct 46 ms 6736 KB Output is correct
25 Execution timed out 2078 ms 46460 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5712 KB Output is correct
2 Correct 4 ms 5800 KB Output is correct
3 Execution timed out 2062 ms 35408 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #7
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5712 KB Output is correct
2 Correct 2 ms 5588 KB Output is correct
3 Correct 3 ms 5712 KB Output is correct
4 Correct 3 ms 5712 KB Output is correct
5 Correct 2 ms 5712 KB Output is correct
6 Correct 2 ms 5712 KB Output is correct
7 Correct 3 ms 5880 KB Output is correct
8 Correct 2 ms 5720 KB Output is correct
9 Correct 2 ms 5712 KB Output is correct
10 Correct 2 ms 5712 KB Output is correct
11 Correct 7 ms 5712 KB Output is correct
12 Correct 6 ms 5712 KB Output is correct
13 Correct 6 ms 5712 KB Output is correct
14 Correct 3 ms 5712 KB Output is correct
15 Correct 3 ms 5712 KB Output is correct
16 Correct 3 ms 5944 KB Output is correct
17 Correct 4 ms 5712 KB Output is correct
18 Correct 1302 ms 6540 KB Output is correct
19 Correct 1183 ms 6768 KB Output is correct
20 Correct 1188 ms 6772 KB Output is correct
21 Correct 45 ms 6736 KB Output is correct
22 Correct 46 ms 6736 KB Output is correct
23 Correct 48 ms 6736 KB Output is correct
24 Correct 46 ms 6736 KB Output is correct
25 Correct 2 ms 5712 KB Output is correct
26 Correct 1208 ms 6620 KB Output is correct
27 Correct 1170 ms 6660 KB Output is correct
28 Correct 1292 ms 6608 KB Output is correct
29 Correct 1210 ms 6692 KB Output is correct
30 Correct 105 ms 6480 KB Output is correct
31 Correct 123 ms 6496 KB Output is correct
32 Correct 108 ms 6480 KB Output is correct
33 Correct 112 ms 6480 KB Output is correct
34 Execution timed out 2078 ms 46460 KB Time limit exceeded
35 Halted 0 ms 0 KB -