Submission #1223648

#	Time	Username	Problem	Language	Result	Execution time	Memory
1223648		Ludissey	Stations (IOI20_stations)	C++20	0 / 100	307 ms	580 KiB

stations

#include "stations.h"
#include <vector>
#include <bits/stdc++.h>

using namespace std;

#define sz(a) (int)a.size()
#define all(a) (a.begin(), a.end())

vector<vector<int>> neigh;
vector<int> labels;
int tim=0;

void dfs(int x,int p){
    labels[x]=tim++;
    for (auto u : neigh[x])
    {
        if(u==p) continue;
        dfs(u,x);
    }
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	labels.clear();
	neigh.clear();
    labels.resize(n);
	neigh.resize(n);
    tim=0;
    for (int i = 0; i < n-1; i++)
    {
        neigh[u[i]].push_back(v[i]);
        neigh[v[i]].push_back(u[i]);
    }
    for (int i = 0; i < n; i++){
        if(sz(neigh[i])==1) { dfs(i,-1); break; }
    }

    dfs(0,-1);
    
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
    if(sz(c)==1) return c[1];
    for (int i=0; i< sz(c); i++)
    {
        int u=c[i];
        if(t>=s&&u>=s) return u;
        if(t<=s&&u<=s) return u;
    }
    return c[0];

}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61