Submission #480705

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
480705	2021-10-17 22:48:24	SirCovidThe19th	Synchronization (JOI13_synchronization)	C++17	100 / 100	620 ms	24572 KiB

synchronization

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#include <bits/stdc++.h>
using namespace std;
 
const int mx = 1e5 + 5, ml = 17;
 
int n, m, q, vals[mx], ans[mx], bit[mx], up[mx][ml], tin[mx], tout[mx], ti; 
 
bool on[mx]; vector<int> adj[mx]; vector<pair<int, int>> edg;
 
void dfs(int u){
    tin[u] = ++ti;
    for (int l = 1; l < ml; l++) up[u][l] = up[up[u][l - 1]][l - 1];
    for (int v : adj[u]) if (v != up[u][0]) up[v][0] = u, dfs(v);
    tout[u] = ti;
}
void upd(int l, int r, int v){
    for (; l <= n; l += l & (-l)) bit[l] += v;
    for (r++; r <= n; r += r & (-r)) bit[r] -= v;
}
int qry(int i){
    int ret = 0;
  for(;i; i -= i & (-i)) ret += bit[i];
  return ret;
}
int par(int i){
    for (int l = ml - 1; ~l; l--){
        int anc = up[i][l];
        if (anc and qry(tin[i]) == qry(tin[anc])) i = anc;
    }
    return i;
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 10 / 10
• Subtask 4: 20 / 20
• Subtask 5: 40 / 40