Submission #865839

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
865839	2023-10-24 23:24:47	AbdelmagedNour	Inside information (BOI21_servers)	C++17	5 / 100	3585 ms	248044 KiB

servers

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#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
using namespace std;
typedef long long ll;
const int N=250005,SQ=100;
vector<vector<pair<int,int>>>adj(N);
deque<int>cur_adj[N],order;
int in[N],out[N],dep[N],p[N][19],val[N],max_inc[N],max_dec[N],T;
void init_dfs(int v,int par){
  in[v]=++T;order.push_back(v);
  p[v][0]=par;
  for(int i=1;i<19;i++)p[v][i]=p[p[v][i-1]][i-1];
  max_inc[v]=max_dec[v]=par;
  if(val[v]<val[par])max_inc[v]=max_inc[par];
  else max_dec[v]=max_dec[par];
  for(auto e:adj[v]){
    int u=e.first,w=e.second;
    if(u==par)continue;
    dep[u]=dep[v]+1;
    val[u]=w;
    init_dfs(u,v);
  }
  out[v]=T;
}
bool anc(int v,int u){
  return in[v]<=in[u]&&out[u]<=out[v];
}
int max_in_path(int u,int v){
  if(anc(u,v))return val[v];
  int pu=u,pv=v;
 
 
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• Subtask 1: 2.5 / 2.5
• Subtask 2: 2.5 / 2.5
• Subtask 3: 0 / 2.5
• Subtask 4: 0 / 2.5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 12.5
• Subtask 10: 0 / 12.5
• Subtask 11: 0 / 17.5
• Subtask 12: 0 / 17.5