Submission #350406

#	Time	Username	Problem	Language	Result	Execution time	Memory
350406		talant117408	Stations (IOI20_stations)	C++17	100 / 100	1166 ms	1168 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
#ifndef EVAL
#include "stub.cpp"
#endif
using namespace std;

typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

#define precision(n) fixed << setprecision(n)
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define mp make_pair
#define eps (double)1e-9
#define PI 2*acos(0.0)
#define endl "\n"
#define sz(v) int((v).size())
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define OK cout << "OK" << endl;

vector <vector <int>> graph(1003);
int timer, tin[1003], tout[1003];

void dfs(int v, int p, int type){
    if(type) tout[v] = ++timer;
    for(auto to : graph[v]){
        if(to != p){
            dfs(to, v, 1-type);
        }
    }
    if(!type) tout[v] = ++timer;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v){
    timer = 0;
    for(int i = 0; i < n; i++){
        graph[i].clear();
    }
    vector <int> labels(n);
    for(int i = 0; i < sz(u); i++){
        graph[u[i]].pb(v[i]);
        graph[v[i]].pb(u[i]);
    }
    dfs(0, 0, 0);
    for(int i = 0; i < n; i++){
        labels[i] = tout[i];
    }
    return labels;
}

int find_next_station(int s, int t, vector<int> c){
    if(s > c.back()){
        if(t < c[0] || s < t) return c[0];
        auto it = ub(all(c), t);
        return *(--it);
    }
    else{
        if(c.back() < t || t < s) return c.back();
        auto it = lb(all(c), t);
        return *it;
    }
}

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