제출 #533102

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
533102	2022-03-04 19:15:26	cig32	경주 (Race) (IOI11_race)	C++17	100 / 100	1264 ms	46448 KiB

race

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#include "race.h"
#include <bits/stdc++.h>
using namespace std;
 
vector<vector<array<int, 2>>> adj;
int n, k, ans = 2e9, nodes;
vector<int> sub;
bitset<200000> is_cent; 
map<int, int> mp2;
 
void precalc (int u, int p = -1) {
  sub[u] = 1;
  ++nodes;
  for (auto &v : adj[u]) {
    if (!is_cent[v[0]] && v[0] ^ p) {
      precalc(v[0], u);
      sub[u] += sub[v[0]];
    }
  }
}
 
int centroid (int u, int p = -1) {
  for (auto &v : adj[u]) {
    if (!is_cent[v[0]] && v[0] ^ p) {
      if (sub[v[0]] > nodes / 2) {
        return centroid(v[0], u);
      }
    }
  }
  return u;
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 22 / 22
• Subtask 4: 57 / 57