Submission #373764

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
373764	2021-03-05 16:30:42	lohacho	Construction of Highway (JOI18_construction)	C++14	100 / 100	795 ms	22636 KiB

construction

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#include <bits/stdc++.h>
using namespace std;
const int NS = (int)1e5 + 4;
int n, c[NS];
vector<int> way[NS];
int sz[NS], in[NS], incnt, up[NS], pr[NS];
pair<int, int> que[NS];
vector<pair<int, int>> block;
void dfs_sz(int x, int from){
  sz[x] = 1; pr[x] = from;
  for(auto&nxt:way[x]){
    if(nxt == from){
      continue;
    }
    dfs_sz(nxt, x);
    sz[x] += sz[nxt];
    if(way[x][0] == from || sz[way[x][0]] < sz[nxt]){
      swap(way[x][0], nxt);
    }
  }
}
void dfs_hld(int x, int from){
  in[x] = incnt++;
  for(auto&nxt:way[x]){
    if(nxt == from){
      continue;
 
 
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• Subtask 1: 7 / 7
• Subtask 2: 9 / 9
• Subtask 3: 84 / 84