Submission #821742

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
821742	2023-08-11 14:51:18	WLZ	Factories (JOI14_factories)	C++17	100 / 100	5132 ms	149768 KiB

factories

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#include "factories.h"
#include <bits/stdc++.h>
using namespace std;
const long long LINF = (long long) 1e18;
int n, max_log;
vector< vector< pair<int, int> > > g;
vector<int> sz, cd;
vector<bool> used;
int calc_sizes(int u, int par) {
  sz[u] = 1;
  for (auto &[v, w] : g[u]) if (v != par && !used[v]) sz[u] += calc_sizes(v, u);
  return sz[u];
}
int find_centroid(int u, int par, int cur_sz) {
  for (auto &[v, w] : g[u]) if (v != par && !used[v] && sz[v] > cur_sz / 2) return find_centroid(v, u, cur_sz);
  return u;
}
void decompose(int u, int par) {
  int centroid = find_centroid(u, par, calc_sizes(u, par));
  cd[centroid] = par; used[centroid] = true;
  for (auto &[v, w] : g[centroid]) if (!used[v] && v != par) decompose(v, centroid);
}
int dfs_cnt = 0;
vector< vector<int> > up;
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 18 / 18
• Subtask 3: 67 / 67