제출 #571289

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
571289	2022-06-01 16:17:31	Vanilla	자매 도시 (APIO20_swap)	C++17	13 / 100	447 ms	76756 KiB

swap

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#include "swap.h"
#include <bits/stdc++.h>
using namespace std;
const int maxn = 4e5 + 2;
int extra = 2e5 + 1;
// int extra = 9;
const int lg = 25;
vector <int> ad [maxn];
int deg [maxn];
int dad [maxn];
int val [maxn];
vector <bool> good (maxn, 0);
vector <int> cmp[maxn];
vector <int> depth (maxn);
int up[maxn][lg];
 
void dfs (int u) {
    for (auto v: cmp[u]) {
        depth[v] = depth[u] + 1;
        up[v][0] = u;
        for (int i = 1; i < lg; i++){
            up[v][i] = up[up[v][i-1]][i-1];
        }
        dfs(v);
    }
}
 
int lca (int x, int y) {
    if (depth[x] < depth[y]) {
        swap(x, y);
 
 
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