Submission #170896

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
170896	2019-12-26 16:41:36	WLZ	Race (IOI11_race)	C++14	100 / 100	1964 ms	62728 KiB

race

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#include "race.h"
#include <bits/stdc++.h>
using namespace std;
const int INF = 0x3f3f3f3f;
int n, k, ans = INF;
vector< map<int, int> > g;
vector<int> sz;
map<int, int> len, new_len;
int dfs(int u, int par) {
  sz[u] = 1;
  for (auto& v : g[u]) {
    if (v.first != par) {
      sz[u] += dfs(v.first, u);
    }
  }
  return sz[u];
}
int find_centroid(int u, int par, int n) {
  for (auto& v : g[u]) {
    if (v.first != par && sz[v.first] > n / 2) {
      return find_centroid(v.first, u, n);
    }
  }
  return u;
}
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 22 / 22
• Subtask 4: 57 / 57