Submission #549317

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
549317	2022-04-15 15:21:40	sidon	Synchronization (JOI13_synchronization)	C++17	100 / 100	269 ms	24592 KiB

synchronization

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#include <bits/stdc++.h>
using namespace std;
 
const int Z = 1e5+2, B = 17;
 
int N, M, Q, last[Z], L[Z], R[Z], p[Z][B], ans[Z], dfsTimer;
array<int, 2> h[Z];
bool state[Z];
vector<int> g[Z];
 
void dfs(int u) {
  L[u] = ++dfsTimer;
  for(int i = 0; i + 1 < B; ++i)
    p[u][i+1] = p[p[u][i]][i];
  for(const int &v : g[u]) if(v != p[u][0])
    p[v][0] = u, dfs(v);
  R[u] = 1+dfsTimer;
}
 
int F[Z];
 
int get(int i) {
  int v = 0;
  for(; i >= 1; i -= i&-i) v += F[i];
  return v;
}
 
void add(int i, int v) {
  for(; i <= N; i += i&-i) F[i] += v;
}
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 10 / 10
• Subtask 4: 20 / 20
• Subtask 5: 40 / 40