Submission #391624

#	Time	Username	Problem	Language	Result	Execution time	Memory
391624		ljuba	Stations (IOI20_stations)	C++17	100 / 100	1136 ms	1012 KiB

stations

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

using namespace std; 

const int mxN = 1100;
vector<int> adj[mxN];

std::vector<int> labels;
int timer = 0;

void dfs(int s, int p, int pa) {
    if(pa^1)
        labels[s] = timer++;
    for(auto e : adj[s]) {
        if(e == p) continue;
        dfs(e, s, pa^1);
    }
    if(pa)
        labels[s] = timer++;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    for(int i = 0; i < n; ++i) {
        adj[i].clear();
    }
    timer = 0;
    for(int i = 0; i < n-1; ++i) {
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
    }
    labels.resize(n);
    dfs(0, -1, 0);
    for(auto z : labels)
        cerr << z << " ";
    cerr << endl;
    return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
    sort(c.begin(), c.end());
    if(s < c[0]) {
        //in ostali out
        for(auto e : c) {
            if(t >= s && t <= e)
                return e;
        }

        return c.back();
    } else {
        //out ostali in
        reverse(c.begin(), c.end());
        for(auto e : c) {
            if(t <= s && t >= e)
                return e;
        }
        return c.back();
    }
}

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