Submission #384177

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
384177	2021-03-31 16:15:07	Aryan_Raina	Factories (JOI14_factories)	C++14	100 / 100	6464 ms	191508 KiB

factories

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#include "factories.h"
#include <bits/stdc++.h>
using namespace std;
#define ar array
#define ll long long
const int MXN = 5e5+9, LGN = 20;
const ll INF = 1e17;
ll n, sz[MXN], lvl[MXN], par[MXN], dist[LGN][MXN];
bool dead[MXN];
vector<ar<ll,2>> g[MXN];
vector<ll> d(MXN, INF);
void get_sz(int u, int pu) {
  sz[u] = 1;
  for (auto v : g[u]) if (v[1] != pu && !dead[v[1]]) {
    get_sz(v[1], u);
    sz[u] += sz[v[1]];
  }
}
int centroid(int u, int pu, int rt) {
  for (auto v : g[u]) if (v[1] != pu && !dead[v[1]]) {
    if (sz[v[1]] > sz[rt]/2) return centroid(v[1], u, rt);
  }
  return u;
}
int OneCentroid (int rt) { get_sz(rt, rt); return centroid(rt, rt, rt); }
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 18 / 18
• Subtask 3: 67 / 67