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답안 #832963

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
832963 2023-08-21T17:14:41 Z winter0101 Cat Exercise (JOI23_ho_t4) C++14
100 / 100
 340 ms 66680 KB 
#include <bits/stdc++.h>
using namespace std;
#define all(fl) fl.begin(),fl.end()
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define lb lower_bound
#define ub upper_bound
#define sz(a) (int)a.size()
#define pii pair<int,int>
#define pli pair<long long,int>
#define gcd __gcd
#define lcm(x,y) x*y/__gcd(x,y)
#define int long long
const int maxn=2e5+9;
vector<int>a[maxn];
int b[maxn];
int rev[maxn];
int dep[maxn];
int st[maxn][19];
void dfs(int u,int par){
    for (auto v:a[u]){
        if (v==par)continue;
        dep[v]=dep[u]+1;
        st[v][0]=u;
        for1(i,1,18){
        st[v][i]=st[st[v][i-1]][i-1];
        }
        dfs(v,u);
    }
}
long long f[maxn];
int lca(int u,int v){
if (dep[u]<dep[v])swap(u,v);
int k=dep[u]-dep[v];
for2(i,18,0){
if (k>>i&1)u=st[u][i];
}
if (u==v)return u;
for2(i,18,0){
if (!st[u][i]||!st[v][i])continue;
if (st[u][i]!=st[v][i]){
    u=st[u][i];
    v=st[v][i];
}
}
return st[u][0];
}
long long dis(int u,int v){
return dep[u]+dep[v]-2*dep[lca(u,v)];
}
int c[maxn],mx[maxn];
int findset(int u){
if (c[u]<0)return u;
return c[u]=findset(c[u]);
}
void unite(int u,int v){
u=findset(u),v=findset(v);
if (u==v)return ;
if (mx[u]<mx[v])swap(u,v);
f[u]=max(f[u],f[v]+dis(rev[mx[u]],rev[mx[v]]));
mx[u]=max(mx[u],mx[v]);
c[u]+=c[v];
c[v]=u;
}
int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("temp.INP","r",stdin);
    //freopen("temp.OUT","w",stdout);
    int n;
    cin>>n;
    for1(i,1,n){
    cin>>b[i];
    rev[b[i]]=i;
    }
    for1(i,1,n-1){
    int u,v;
    cin>>u>>v;
    a[u].pb(v);
    a[v].pb(u);
    }
    int root;
    for1(i,1,n)if (b[i]==n)root=i;
    dfs(root,0);
    for1(i,1,n){
    c[i]=-1;
    mx[i]=b[i];
    }
    for1(i,1,n){
    for(auto v:a[rev[i]]){
        if (b[v]<i){
            unite(v,rev[i]);
        }
    }
    }
    cout<<f[findset(root)];
}

Compilation message

Main.cpp: In function 'int32_t main()':
Main.cpp:100:20: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized]
  100 |     cout<<f[findset(root)];
      |             ~~~~~~~^~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5024 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4960 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5024 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4960 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5152 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5024 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5024 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4960 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5152 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5024 KB Output is correct
18 Correct 7 ms 6572 KB Output is correct
19 Correct 5 ms 6576 KB Output is correct
20 Correct 5 ms 6568 KB Output is correct
21 Correct 5 ms 6484 KB Output is correct
22 Correct 5 ms 6356 KB Output is correct
23 Correct 5 ms 6448 KB Output is correct
24 Correct 5 ms 6356 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5024 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4960 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5152 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5024 KB Output is correct
18 Correct 7 ms 6572 KB Output is correct
19 Correct 5 ms 6576 KB Output is correct
20 Correct 5 ms 6568 KB Output is correct
21 Correct 5 ms 6484 KB Output is correct
22 Correct 5 ms 6356 KB Output is correct
23 Correct 5 ms 6448 KB Output is correct
24 Correct 5 ms 6356 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 6 ms 6496 KB Output is correct
27 Correct 5 ms 6448 KB Output is correct
28 Correct 6 ms 6484 KB Output is correct
29 Correct 5 ms 6484 KB Output is correct
30 Correct 6 ms 6192 KB Output is correct
31 Correct 7 ms 6228 KB Output is correct
32 Correct 5 ms 6228 KB Output is correct
33 Correct 5 ms 6184 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5024 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4960 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5152 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5024 KB Output is correct
18 Correct 7 ms 6572 KB Output is correct
19 Correct 5 ms 6576 KB Output is correct
20 Correct 5 ms 6568 KB Output is correct
21 Correct 5 ms 6484 KB Output is correct
22 Correct 5 ms 6356 KB Output is correct
23 Correct 5 ms 6448 KB Output is correct
24 Correct 5 ms 6356 KB Output is correct
25 Correct 121 ms 66680 KB Output is correct
26 Correct 146 ms 66608 KB Output is correct
27 Correct 126 ms 66584 KB Output is correct
28 Correct 192 ms 63572 KB Output is correct
29 Correct 164 ms 65292 KB Output is correct
30 Correct 161 ms 64716 KB Output is correct
31 Correct 205 ms 65460 KB Output is correct

Subtask #6
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 169 ms 55628 KB Output is correct
4 Correct 171 ms 55628 KB Output is correct
5 Correct 180 ms 55672 KB Output is correct

Subtask #7
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5024 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4960 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5152 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5024 KB Output is correct
18 Correct 7 ms 6572 KB Output is correct
19 Correct 5 ms 6576 KB Output is correct
20 Correct 5 ms 6568 KB Output is correct
21 Correct 5 ms 6484 KB Output is correct
22 Correct 5 ms 6356 KB Output is correct
23 Correct 5 ms 6448 KB Output is correct
24 Correct 5 ms 6356 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 6 ms 6496 KB Output is correct
27 Correct 5 ms 6448 KB Output is correct
28 Correct 6 ms 6484 KB Output is correct
29 Correct 5 ms 6484 KB Output is correct
30 Correct 6 ms 6192 KB Output is correct
31 Correct 7 ms 6228 KB Output is correct
32 Correct 5 ms 6228 KB Output is correct
33 Correct 5 ms 6184 KB Output is correct
34 Correct 121 ms 66680 KB Output is correct
35 Correct 146 ms 66608 KB Output is correct
36 Correct 126 ms 66584 KB Output is correct
37 Correct 192 ms 63572 KB Output is correct
38 Correct 164 ms 65292 KB Output is correct
39 Correct 161 ms 64716 KB Output is correct
40 Correct 205 ms 65460 KB Output is correct
41 Correct 2 ms 4948 KB Output is correct
42 Correct 3 ms 5076 KB Output is correct
43 Correct 169 ms 55628 KB Output is correct
44 Correct 171 ms 55628 KB Output is correct
45 Correct 180 ms 55672 KB Output is correct
46 Correct 326 ms 63428 KB Output is correct
47 Correct 253 ms 63432 KB Output is correct
48 Correct 289 ms 64820 KB Output is correct
49 Correct 315 ms 63392 KB Output is correct
50 Correct 256 ms 55176 KB Output is correct
51 Correct 281 ms 55220 KB Output is correct
52 Correct 340 ms 55196 KB Output is correct
53 Correct 270 ms 55172 KB Output is correct