Submission #543136

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
543136	2022-03-29 12:55:57	sidon	Spring cleaning (CEOI20_cleaning)	C++17	100 / 100	184 ms	26272 KiB

cleaning

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#include <bits/stdc++.h>
using namespace std;
const int Z = 1e5, B = 17;
int N, Q;
vector<int> g[Z], h[Z];
int p[Z][B], L[Z], R[Z], s[Z], d[Z], dfsTimer, rt, leafCnt, ext;
void init(int u) {
  L[u] = dfsTimer++;
  for(int i = 0; i + 1 < B; ++i)
    p[u][i+1] = p[p[u][i]][i];
  s[u] = size(g[u]) > 1;
  leafCnt += !s[u];
  for(const int &v : g[u]) if(v != p[u][0]) {
    p[v][0] = u;
    d[v] = d[u] + 1;
    init(v);
    s[u] ^= s[v] ^ 1;
  }
  if(u != rt) ext += s[u];
  R[u] = dfsTimer++;
}
void dfs(int u) {
  for(const int &v : g[u]) if(v != p[u][0])
    s[v] += s[u], dfs(v);
 
 
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• Subtask 1: 0 / 0
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 16 / 16
• Subtask 5: 19 / 19
• Subtask 6: 17 / 17
• Subtask 7: 30 / 30