Submission #676719

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
676719	2022-12-31 19:56:03	d4xn	Race (IOI11_race)	C++17	100 / 100	747 ms	39340 KiB

race

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#pragma GCC optimize ("Ofast")
#include "race.h"
#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define map unordered_map
 
const int N = 2e5+1;
const ll inf = LLONG_MAX;
 
int n, k, sz[N];
ll ans;
vector<pair<int, ll>> adj[N];
bitset<N> r;
 
void dfs(int u, int par) {
  sz[u] = 1;
  for (auto &[v, w] : adj[u]) {
    if (v == par || r[v]) continue;
    dfs(v, u);
    sz[u] += sz[v];
  }
}
 
int find_centroid(int u, int par, int rt) {
  for (auto &[v, w] : adj[u]) {
    if (v != par && !r[v] && sz[v] > sz[rt]/2) {
      return find_centroid(v, u, rt);
    }
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 22 / 22
• Subtask 4: 57 / 57