Submission #660211

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
660211	2022-11-21 06:55:51	QwertyPi	Regions (IOI09_regions)	C++14	100 / 100	5345 ms	34088 KiB

regions

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#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2")
using namespace std;
const int N = 1 << 18;
const int LGN = 18;
const int R = 25001;
const int B = 500;
int p[N], r[N];
int tl[N], tr[N], preord[N], cnt[R];
int prec[N / B][R], id[R], ids = 0;
vector<int> G[N];
vector<int> emp[N];
vector<int> pos[R];
int n, rn, q;
int ct = 0;
void dfs(int v){
  tl[v] = ++ct; preord[ct] = v;
  for(auto u : G[v]){
    dfs(u);
  }
  tr[v] = ct;
}
bool vis[N];
void dfs_prec(int Co, int v, int acc = 0){
  if(r[v] == Co) vis[v] = true;
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 85 / 85