Submission #478216

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
478216	2021-10-06 13:43:36	Abrar_Al_Samit	Regions (IOI09_regions)	C++17	100 / 100	4994 ms	34708 KiB

regions

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#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>
using namespace std;
const int MX = 200005;
const int B = 447;
int N, R, Q;
vector <int> g[MX], region[MX];
int H[MX], st[MX], en[MX], stwho[MX];
int idx[MX], timer=1;
long long prep[B][25001];
  
void Flat(int v, int p) {
  stwho[timer] = v;
  st[v] = timer++;
  region[H[v]].push_back(st[v]);
  for(auto to : g[v]) if(to!=p) {
    Flat(to, v);
  }
  en[v] = timer-1;
}
void DFS(int v, int p, int reg, int cnt) {
  if(H[v]==reg) ++cnt;
  else prep[idx[reg]][H[v]] += cnt;
  for(auto u : g[v]) if(u!=p) {
    DFS(u, v, reg, cnt);
  }
}
int main() {
  cin >> N >> R >> Q;
  cin >> H[1];
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 85 / 85