Submission #314825

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
314825	2020-10-21 11:36:33	kostia244	Stations (IOI20_stations)	C++17	100 / 100	1063 ms	1160 KiB

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#include "stations.h"
#include <bits/stdc++.h>
#define all(x) begin(x), end(x)
using namespace std;
namespace lab {
vector<vector<int>> g;
vector<int> tin, tout, d;
int timer;
void dfs(int v, int p) {
  timer += d[v]%2 == 0;
  tin[v] = timer;
  for(auto &i : g[v]) if(i != p) {
    d[i] = d[v]+1;
    dfs(i, v);
  }
  timer += d[v]%2 == 1;
  tout[v] = timer;
}
};
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
  using namespace lab;
  timer = -1;
  tin = tout = d = vector<int>(n);
  g.assign(n, vector<int>());
  for(int i = 0; i+1 < n; i++) {
    g[u[i]].push_back(v[i]);
    g[v[i]].push_back(u[i]);
  }
  dfs(0, 0);
  std::vector<int> labels(n);
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61