Submission #395931

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
395931	2021-04-29 08:32:47	jeroenodb	Stations (IOI20_stations)	C++14	100 / 100	1128 ms	784 KiB

stations

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#include "stations.h"
#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 1e5+1, oo = 1e9;
int cnt = 0;
void dfs(vvi& adj, vi& label, int at=0, int from=-1, bool odd = false) {
  if(!odd) label[at] = cnt++;
  for(int to: adj[at]) if(to!=from) {
    dfs(adj,label,to,at,!odd);
  }
  if(odd) label[at] = cnt++;
}
vi label(int n, int k, vector<int> u, vector<int> v) {
  vi labels(n);
  cnt=0;
  vvi adj(n);
  for(int i=0;i<n-1;++i) {
    adj[u[i]].push_back(v[i]);
    adj[v[i]].push_back(u[i]);
  }
  dfs(adj,labels);
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61