제출 #966221

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
966221	2024-04-19 14:26:33	12345678	수도 (JOI20_capital_city)	C++17	100 / 100	310 ms	68000 KiB

capital_city

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#include <bits/stdc++.h>
using namespace std;
const int nx=2e5+5, kx=18;
int n, k, u, v, t[nx], lvl[nx], pa[nx][kx], h[nx], vs[nx], rt[nx], sz[nx], ans=INT_MAX;
vector<int> d[nx], c[nx], rv[nx], g[nx];
stack<int> s;
vector<pair<int, int>> edg;
void dfs(int u, int p)
{
    lvl[u]=lvl[p]+1;
    pa[u][0]=p;
    for (int i=1; i<kx; i++) pa[u][i]=pa[pa[u][i-1]][i-1];
    for (auto v:d[u]) if (v!=p) dfs(v, u);
}
int lca(int u, int v)
{
    if (lvl[u]>lvl[v]) swap(u, v);
    for (int i=kx-1; i>=0; i--) if (lvl[pa[v][i]]>=lvl[u]) v=pa[v][i];
    if (u==v) return u;
    for (int i=kx-1; i>=0; i--) if (pa[u][i]!=pa[v][i]) u=pa[u][i], v=pa[v][i];
    return pa[u][0];
}
void dfs1(int u, int p)
{
 
 
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• Subtask 1: 1 / 1
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30
• Subtask 4: 59 / 59