Submission #419475

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
419475	2021-06-07 07:37:10	amoo_safar	Meetings 2 (JOI21_meetings2)	C++17	100 / 100	536 ms	49220 KiB

meetings2

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// vaziat meshki-ghermeze !
#include <bits/stdc++.h>
#define pb push_back
#define F first
#define S second
using namespace std;
const int N = 2e5 + 10;
const int Log = 20;
vector<int> G[N];
vector< pair<int, int> > E[N];
int n;
int sp[N][Log];
int sub[N], dep[N];
int DFS(int u, int p, int d){
  sp[u][0] = p;
  sub[u] = 1;
  dep[u] = d;
  for(int l = 1; l < Log; l++)
    sp[u][l] = sp[ sp[u][l - 1] ][l - 1];
  for(auto adj : G[u])
    if(adj != p)
      sub[u] += DFS(adj, u, d + 1);
  E[min(n - sub[u], sub[u])].pb({u, p});
  return sub[u];
 
 
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• Subtask 1: 4 / 4
• Subtask 2: 16 / 16
• Subtask 3: 80 / 80