Submission #560248

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
5602482022-05-11 08:04:47Ooops_sorryInside information (BOI21_servers)C++14
0 / 100
26 ms10796 KiB
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ld long double
#define ll long long
mt19937 rnd(51);
const int N = 1.2e5 + 10, INF = 1e9;
vector<pair<int,int>> g[N], need[N];
vector<int> sz(N), ans(N), val(N), fir(N);
vector<bool> used(N), good(N);
vector<int> arr;
void zhfs(int v, int p) {
sz[v] = 1;
for (auto to : g[v]) {
if (to.first != p && !used[to.first]) {
zhfs(to.first, v);
sz[v] += sz[to.first];
}
}
}
int find_centroid(int v, int p, int n) {
for (auto to : g[v]) {
if (to.first != p && !used[to.first] && sz[to.first] > n / 2) {
return find_centroid(to.first, v, n);
 
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