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답안 #1037424

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1037424 2024-07-28T20:18:50 Z aaaaaarroz Cat Exercise (JOI23_ho_t4) C++17
100 / 100
 274 ms 79280 KB 
#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;
const int N=2e5+5;
int a[N],d[N],p[N],dp[N];
vector <int> g[N],g2[N];
int jmp[20][N];
void dfs(int v,int p){
  jmp[0][v]=p;
  for(auto to : g[v]){
    if(to!=p){
      d[to]=d[v]+1;
      dfs(to,v);
    }
  }
}
int lca(int v,int u){
  if(d[v]<d[u])swap(u,v);
  for(int k=19;k>=0;k--){
    if(d[jmp[k][v]]>=d[u]){
      v=jmp[k][v];
    }
  }
  if(u==v)return v;
  for(int k=19;k>=0;k--){
    if(jmp[k][v]!=jmp[k][u]){
      v=jmp[k][v];
      u=jmp[k][u];
    }
  }
  return jmp[0][v];
}
int find_set(int v){
  if(p[v]==v)return v;
  return p[v]=find_set(p[v]);
}
void union_set(int v,int u){
  u=find_set(u);
  p[u]=v;
  g2[v].pb(u);
}

int dist(int v,int u){
  int l=lca(u,v);
  return d[u]+d[v]-2*d[l];
}
void dfs2(int v,int p){
  for(auto to : g2[v]){
    if(to!=p){
      dfs2(to,v);
      dp[v]=max(dp[to]+dist(to,v),dp[v]);
    }
  }
}
signed main(){
  int n;
  cin>>n;
  for(int i=1;i<=n;i++){
    cin>>a[i];
    p[i]=i;
  }
  for(int i=0;i<n-1;i++){
    int u,v;
    cin>>u>>v;
    g[a[u]].pb(a[v]);
    g[a[v]].pb(a[u]);
  }
  dfs(n,n);
  for(int k=1;k<20;k++){
    for(int i=1;i<=n;i++){
      jmp[k][i]=jmp[k-1][jmp[k-1][i]];
    }
  }
  for(int i=2;i<=n;i++){
    for(auto to : g[i]){
      if(to<i){
        union_set(i,to);
      }
    }
  }
  dfs2(n,0);
  cout<<dp[n]<<"\n";
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 43356 KB Output is correct
2 Correct 5 ms 43356 KB Output is correct
3 Correct 5 ms 43356 KB Output is correct
4 Correct 5 ms 43356 KB Output is correct
5 Correct 5 ms 43368 KB Output is correct
6 Correct 5 ms 43532 KB Output is correct
7 Correct 5 ms 43356 KB Output is correct
8 Correct 5 ms 43548 KB Output is correct
9 Correct 5 ms 43356 KB Output is correct
10 Correct 5 ms 43464 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 43356 KB Output is correct
2 Correct 5 ms 43356 KB Output is correct
3 Correct 5 ms 43356 KB Output is correct
4 Correct 5 ms 43356 KB Output is correct
5 Correct 5 ms 43368 KB Output is correct
6 Correct 5 ms 43532 KB Output is correct
7 Correct 5 ms 43356 KB Output is correct
8 Correct 5 ms 43548 KB Output is correct
9 Correct 5 ms 43356 KB Output is correct
10 Correct 5 ms 43464 KB Output is correct
11 Correct 6 ms 43352 KB Output is correct
12 Correct 5 ms 43356 KB Output is correct
13 Correct 5 ms 43356 KB Output is correct
14 Correct 6 ms 43352 KB Output is correct
15 Correct 5 ms 43356 KB Output is correct
16 Correct 5 ms 43548 KB Output is correct
17 Correct 5 ms 43356 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 43356 KB Output is correct
2 Correct 5 ms 43356 KB Output is correct
3 Correct 5 ms 43356 KB Output is correct
4 Correct 5 ms 43356 KB Output is correct
5 Correct 5 ms 43368 KB Output is correct
6 Correct 5 ms 43532 KB Output is correct
7 Correct 5 ms 43356 KB Output is correct
8 Correct 5 ms 43548 KB Output is correct
9 Correct 5 ms 43356 KB Output is correct
10 Correct 5 ms 43464 KB Output is correct
11 Correct 6 ms 43352 KB Output is correct
12 Correct 5 ms 43356 KB Output is correct
13 Correct 5 ms 43356 KB Output is correct
14 Correct 6 ms 43352 KB Output is correct
15 Correct 5 ms 43356 KB Output is correct
16 Correct 5 ms 43548 KB Output is correct
17 Correct 5 ms 43356 KB Output is correct
18 Correct 8 ms 44380 KB Output is correct
19 Correct 8 ms 44380 KB Output is correct
20 Correct 9 ms 44380 KB Output is correct
21 Correct 8 ms 44180 KB Output is correct
22 Correct 8 ms 44124 KB Output is correct
23 Correct 8 ms 44124 KB Output is correct
24 Correct 9 ms 43868 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 43356 KB Output is correct
2 Correct 5 ms 43356 KB Output is correct
3 Correct 5 ms 43356 KB Output is correct
4 Correct 5 ms 43356 KB Output is correct
5 Correct 5 ms 43368 KB Output is correct
6 Correct 5 ms 43532 KB Output is correct
7 Correct 5 ms 43356 KB Output is correct
8 Correct 5 ms 43548 KB Output is correct
9 Correct 5 ms 43356 KB Output is correct
10 Correct 5 ms 43464 KB Output is correct
11 Correct 6 ms 43352 KB Output is correct
12 Correct 5 ms 43356 KB Output is correct
13 Correct 5 ms 43356 KB Output is correct
14 Correct 6 ms 43352 KB Output is correct
15 Correct 5 ms 43356 KB Output is correct
16 Correct 5 ms 43548 KB Output is correct
17 Correct 5 ms 43356 KB Output is correct
18 Correct 8 ms 44380 KB Output is correct
19 Correct 8 ms 44380 KB Output is correct
20 Correct 9 ms 44380 KB Output is correct
21 Correct 8 ms 44180 KB Output is correct
22 Correct 8 ms 44124 KB Output is correct
23 Correct 8 ms 44124 KB Output is correct
24 Correct 9 ms 43868 KB Output is correct
25 Correct 5 ms 43356 KB Output is correct
26 Correct 8 ms 44308 KB Output is correct
27 Correct 8 ms 44192 KB Output is correct
28 Correct 8 ms 44124 KB Output is correct
29 Correct 9 ms 44124 KB Output is correct
30 Correct 8 ms 43868 KB Output is correct
31 Correct 11 ms 43868 KB Output is correct
32 Correct 10 ms 44000 KB Output is correct
33 Correct 9 ms 43868 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 43356 KB Output is correct
2 Correct 5 ms 43356 KB Output is correct
3 Correct 5 ms 43356 KB Output is correct
4 Correct 5 ms 43356 KB Output is correct
5 Correct 5 ms 43368 KB Output is correct
6 Correct 5 ms 43532 KB Output is correct
7 Correct 5 ms 43356 KB Output is correct
8 Correct 5 ms 43548 KB Output is correct
9 Correct 5 ms 43356 KB Output is correct
10 Correct 5 ms 43464 KB Output is correct
11 Correct 6 ms 43352 KB Output is correct
12 Correct 5 ms 43356 KB Output is correct
13 Correct 5 ms 43356 KB Output is correct
14 Correct 6 ms 43352 KB Output is correct
15 Correct 5 ms 43356 KB Output is correct
16 Correct 5 ms 43548 KB Output is correct
17 Correct 5 ms 43356 KB Output is correct
18 Correct 8 ms 44380 KB Output is correct
19 Correct 8 ms 44380 KB Output is correct
20 Correct 9 ms 44380 KB Output is correct
21 Correct 8 ms 44180 KB Output is correct
22 Correct 8 ms 44124 KB Output is correct
23 Correct 8 ms 44124 KB Output is correct
24 Correct 9 ms 43868 KB Output is correct
25 Correct 190 ms 79280 KB Output is correct
26 Correct 178 ms 77140 KB Output is correct
27 Correct 176 ms 77136 KB Output is correct
28 Correct 223 ms 68436 KB Output is correct
29 Correct 237 ms 69688 KB Output is correct
30 Correct 237 ms 69488 KB Output is correct
31 Correct 239 ms 69972 KB Output is correct

Subtask #6
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 43356 KB Output is correct
2 Correct 5 ms 43356 KB Output is correct
3 Correct 238 ms 64176 KB Output is correct
4 Correct 225 ms 64592 KB Output is correct
5 Correct 274 ms 64160 KB Output is correct

Subtask #7
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 43356 KB Output is correct
2 Correct 5 ms 43356 KB Output is correct
3 Correct 5 ms 43356 KB Output is correct
4 Correct 5 ms 43356 KB Output is correct
5 Correct 5 ms 43368 KB Output is correct
6 Correct 5 ms 43532 KB Output is correct
7 Correct 5 ms 43356 KB Output is correct
8 Correct 5 ms 43548 KB Output is correct
9 Correct 5 ms 43356 KB Output is correct
10 Correct 5 ms 43464 KB Output is correct
11 Correct 6 ms 43352 KB Output is correct
12 Correct 5 ms 43356 KB Output is correct
13 Correct 5 ms 43356 KB Output is correct
14 Correct 6 ms 43352 KB Output is correct
15 Correct 5 ms 43356 KB Output is correct
16 Correct 5 ms 43548 KB Output is correct
17 Correct 5 ms 43356 KB Output is correct
18 Correct 8 ms 44380 KB Output is correct
19 Correct 8 ms 44380 KB Output is correct
20 Correct 9 ms 44380 KB Output is correct
21 Correct 8 ms 44180 KB Output is correct
22 Correct 8 ms 44124 KB Output is correct
23 Correct 8 ms 44124 KB Output is correct
24 Correct 9 ms 43868 KB Output is correct
25 Correct 5 ms 43356 KB Output is correct
26 Correct 8 ms 44308 KB Output is correct
27 Correct 8 ms 44192 KB Output is correct
28 Correct 8 ms 44124 KB Output is correct
29 Correct 9 ms 44124 KB Output is correct
30 Correct 8 ms 43868 KB Output is correct
31 Correct 11 ms 43868 KB Output is correct
32 Correct 10 ms 44000 KB Output is correct
33 Correct 9 ms 43868 KB Output is correct
34 Correct 190 ms 79280 KB Output is correct
35 Correct 178 ms 77140 KB Output is correct
36 Correct 176 ms 77136 KB Output is correct
37 Correct 223 ms 68436 KB Output is correct
38 Correct 237 ms 69688 KB Output is correct
39 Correct 237 ms 69488 KB Output is correct
40 Correct 239 ms 69972 KB Output is correct
41 Correct 5 ms 43356 KB Output is correct
42 Correct 5 ms 43356 KB Output is correct
43 Correct 238 ms 64176 KB Output is correct
44 Correct 225 ms 64592 KB Output is correct
45 Correct 274 ms 64160 KB Output is correct
46 Correct 189 ms 74196 KB Output is correct
47 Correct 219 ms 74068 KB Output is correct
48 Correct 198 ms 74064 KB Output is correct
49 Correct 182 ms 74064 KB Output is correct
50 Correct 245 ms 62880 KB Output is correct
51 Correct 235 ms 62804 KB Output is correct
52 Correct 236 ms 62800 KB Output is correct
53 Correct 248 ms 62916 KB Output is correct