Submission #171421

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
171421	2019-12-28 16:05:50	dolphingarlic	Synchronization (JOI13_synchronization)	C++14	100 / 100	524 ms	21496 KiB

synchronization

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#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
#define x first
#define y second
using namespace std;
vector<int> g[100001];
pair<int, int> e[200001];
int n, m, q, f[100001], l[100001], t = 1, tin[100001], tout[100001], c[100001][20], b[100001];
void dfs(int v = 1, int p = 0) {
    c[v][0] = p;
    for (int i = 1; i < 20 && c[v][i - 1]; i++) c[v][i] = c[c[v][i - 1]][i - 1];
    f[v] = 1;
    tin[v] = t++;
    for (int i : g[v]) if (i != p) dfs(i, v);
    tout[v] = t;
}
void up(int p, int val) { for (; p <= n; p += (p & (-p))) b[p] += val; }
int qu(int p) {
    int ans = 0;
    for (; p; p -= (p & (-p))) ans += b[p];
    return ans;
}
int lca(int v) {
    int ll = v;
    for (int i = 19; ~i; i--) if (c[ll][i] && qu(tin[c[ll][i]]) == qu(tin[v])) ll = c[ll][i];
    return ll;
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 10 / 10
• Subtask 4: 20 / 20
• Subtask 5: 40 / 40