Submission #518360

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
518360	2022-01-23 14:22:07	Alex_tz307	Regions (IOI09_regions)	C++17	100 / 100	2587 ms	35748 KiB

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#include <bits/stdc++.h>
using namespace std;
const int kN = 2e5;
const int kR = 25 * 1e3;
const int kBuck = 450;
int timer, r[kN], in[kN], out[kN], ind[kR], cnt[kBuck], sum[1 + kN], root1[kBuck][kR], root2[kBuck][kR];
vector<int> large, g[kN], R[kR];
bitset<kN> isLarge;
vector<pair<int, int>> subtrees[kR];
vector<int> nodes[kR];
void dfs(int u) {
  in[u] = ++timer;
  for (int region : large) {
    root1[ind[region]][r[u]] += cnt[ind[region]];
  }
  if (isLarge[r[u]]) {
    ++cnt[ind[r[u]]];
  }
  for (int v : g[u]) {
    dfs(v);
  }
  if (isLarge[r[u]]) {
    --cnt[ind[r[u]]];
  }
  out[u] = timer;
}
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 85 / 85