oj.uz

Submission #427788

# Submission time Handle Problem Language Result Execution time Memory
427788 2021-06-14T22:41:42 Z Pajaraja Meetings 2 (JOI21_meetings2) C++17
100 / 100
 1110 ms 49876 KB 
#include <bits/stdc++.h>
#define MAXN 200007
#define MAXL 20
using namespace std;
vector<int> g[MAXN],v[MAXN];
int p[MAXL][MAXN],d[MAXN],n,ans[MAXN],c,in[MAXN],out[MAXN],t;
int dfsc(int s,int f,int dub)
{
    p[0][s]=f;
    in[s]=t++;
    d[s]=dub;
    bool centroid=true;
    int sum=1;
    for(int i=0;i<g[s].size();i++) if(g[s][i]!=f)
    {
        int a=dfsc(g[s][i],s,dub+1);
        if(a>n/2) centroid=false;
        sum+=a;
    }
    if(n-sum>n/2) centroid=false;
    if(centroid) c=s;
    out[s]=t++;
    return sum;
}
bool insub(int u,int v) {return in[u]>=in[v] && out[u]<=out[v];}
int lca(int u,int v)
{
    if(insub(u,v)) return v;
    if(insub(v,u)) return u;
    for(int i=MAXL-1;i>=0;i--) if(!insub(v,p[i][u])) u=p[i][u];
    return p[0][u];
}
int dist(int u,int v) {return d[u]+d[v]-2*d[lca(u,v)];}
int dfs(int s,int f)
{
    int sum=1;
    for(int i=0;i<g[s].size();i++) if(g[s][i]!=f) sum+=dfs(g[s][i],s);
    v[sum].push_back(s);
    return sum;
}
int main()
{
    cin>>n;
    for(int i=0;i<n-1;i++)
    {
        int t1,t2;
        cin>>t1>>t2;
        g[t1].push_back(t2);
        g[t2].push_back(t1);
    }
    dfsc(1,1,0);
    for(int i=1;i<MAXL;i++) for(int j=1;j<=n;j++) p[i][j]=p[i-1][p[i-1][j]];
    dfs(c,c);
    int d1=c,d2=c;
    for(int i=n/2;i>=1;i--)
    {
        for(int j=0;j<v[i].size();j++)
        {
            int ds1=dist(v[i][j],d1),ds2=dist(v[i][j],d2),dsp=dist(d1,d2);
            if(ds1>=ds2 && ds1>dsp) d2=v[i][j];
            if(ds2>ds1 && ds2>dsp) d1=v[i][j];
        }
        ans[2*i]=dist(d1,d2);
    }
    for(int i=1;i<=n;i++) cout<<ans[i]+1<<endl;
}

Compilation message

meetings2.cpp: In function 'int dfsc(int, int, int)':
meetings2.cpp:14:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for(int i=0;i<g[s].size();i++) if(g[s][i]!=f)
      |                 ~^~~~~~~~~~~~
meetings2.cpp: In function 'int dfs(int, int)':
meetings2.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(int i=0;i<g[s].size();i++) if(g[s][i]!=f) sum+=dfs(g[s][i],s);
      |                 ~^~~~~~~~~~~~
meetings2.cpp: In function 'int main()':
meetings2.cpp:57:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |         for(int j=0;j<v[i].size();j++)
      |                     ~^~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9804 KB Output is correct
2 Correct 7 ms 9696 KB Output is correct
3 Correct 6 ms 9688 KB Output is correct
4 Correct 6 ms 9824 KB Output is correct
5 Correct 6 ms 9716 KB Output is correct
6 Correct 6 ms 9804 KB Output is correct
7 Correct 6 ms 9824 KB Output is correct
8 Correct 6 ms 9804 KB Output is correct
9 Correct 6 ms 9804 KB Output is correct
10 Correct 6 ms 9804 KB Output is correct
11 Correct 6 ms 9804 KB Output is correct
12 Correct 7 ms 9804 KB Output is correct
13 Correct 7 ms 9804 KB Output is correct
14 Correct 7 ms 9804 KB Output is correct
15 Correct 6 ms 9804 KB Output is correct
16 Correct 6 ms 9792 KB Output is correct
17 Correct 6 ms 9804 KB Output is correct
18 Correct 6 ms 9804 KB Output is correct
19 Correct 6 ms 9804 KB Output is correct
20 Correct 7 ms 9804 KB Output is correct
21 Correct 7 ms 9804 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9804 KB Output is correct
2 Correct 7 ms 9696 KB Output is correct
3 Correct 6 ms 9688 KB Output is correct
4 Correct 6 ms 9824 KB Output is correct
5 Correct 6 ms 9716 KB Output is correct
6 Correct 6 ms 9804 KB Output is correct
7 Correct 6 ms 9824 KB Output is correct
8 Correct 6 ms 9804 KB Output is correct
9 Correct 6 ms 9804 KB Output is correct
10 Correct 6 ms 9804 KB Output is correct
11 Correct 6 ms 9804 KB Output is correct
12 Correct 7 ms 9804 KB Output is correct
13 Correct 7 ms 9804 KB Output is correct
14 Correct 7 ms 9804 KB Output is correct
15 Correct 6 ms 9804 KB Output is correct
16 Correct 6 ms 9792 KB Output is correct
17 Correct 6 ms 9804 KB Output is correct
18 Correct 6 ms 9804 KB Output is correct
19 Correct 6 ms 9804 KB Output is correct
20 Correct 7 ms 9804 KB Output is correct
21 Correct 7 ms 9804 KB Output is correct
22 Correct 17 ms 10316 KB Output is correct
23 Correct 19 ms 10396 KB Output is correct
24 Correct 18 ms 10444 KB Output is correct
25 Correct 17 ms 10296 KB Output is correct
26 Correct 17 ms 10316 KB Output is correct
27 Correct 18 ms 10348 KB Output is correct
28 Correct 17 ms 10316 KB Output is correct
29 Correct 17 ms 10352 KB Output is correct
30 Correct 17 ms 10392 KB Output is correct
31 Correct 22 ms 10340 KB Output is correct
32 Correct 21 ms 10552 KB Output is correct
33 Correct 17 ms 10572 KB Output is correct
34 Correct 19 ms 10360 KB Output is correct
35 Correct 17 ms 10352 KB Output is correct
36 Correct 18 ms 10416 KB Output is correct
37 Correct 18 ms 10316 KB Output is correct
38 Correct 17 ms 10444 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9804 KB Output is correct
2 Correct 7 ms 9696 KB Output is correct
3 Correct 6 ms 9688 KB Output is correct
4 Correct 6 ms 9824 KB Output is correct
5 Correct 6 ms 9716 KB Output is correct
6 Correct 6 ms 9804 KB Output is correct
7 Correct 6 ms 9824 KB Output is correct
8 Correct 6 ms 9804 KB Output is correct
9 Correct 6 ms 9804 KB Output is correct
10 Correct 6 ms 9804 KB Output is correct
11 Correct 6 ms 9804 KB Output is correct
12 Correct 7 ms 9804 KB Output is correct
13 Correct 7 ms 9804 KB Output is correct
14 Correct 7 ms 9804 KB Output is correct
15 Correct 6 ms 9804 KB Output is correct
16 Correct 6 ms 9792 KB Output is correct
17 Correct 6 ms 9804 KB Output is correct
18 Correct 6 ms 9804 KB Output is correct
19 Correct 6 ms 9804 KB Output is correct
20 Correct 7 ms 9804 KB Output is correct
21 Correct 7 ms 9804 KB Output is correct
22 Correct 17 ms 10316 KB Output is correct
23 Correct 19 ms 10396 KB Output is correct
24 Correct 18 ms 10444 KB Output is correct
25 Correct 17 ms 10296 KB Output is correct
26 Correct 17 ms 10316 KB Output is correct
27 Correct 18 ms 10348 KB Output is correct
28 Correct 17 ms 10316 KB Output is correct
29 Correct 17 ms 10352 KB Output is correct
30 Correct 17 ms 10392 KB Output is correct
31 Correct 22 ms 10340 KB Output is correct
32 Correct 21 ms 10552 KB Output is correct
33 Correct 17 ms 10572 KB Output is correct
34 Correct 19 ms 10360 KB Output is correct
35 Correct 17 ms 10352 KB Output is correct
36 Correct 18 ms 10416 KB Output is correct
37 Correct 18 ms 10316 KB Output is correct
38 Correct 17 ms 10444 KB Output is correct
39 Correct 1014 ms 38524 KB Output is correct
40 Correct 969 ms 37812 KB Output is correct
41 Correct 1054 ms 38592 KB Output is correct
42 Correct 1012 ms 38872 KB Output is correct
43 Correct 1042 ms 38872 KB Output is correct
44 Correct 1093 ms 38972 KB Output is correct
45 Correct 1110 ms 45444 KB Output is correct
46 Correct 840 ms 49876 KB Output is correct
47 Correct 1042 ms 39412 KB Output is correct
48 Correct 994 ms 39216 KB Output is correct
49 Correct 889 ms 39500 KB Output is correct
50 Correct 993 ms 39436 KB Output is correct
51 Correct 828 ms 47744 KB Output is correct