Submission #741088

#	Time	Username	Problem	Language	Result	Execution time	Memory
741088		siewjh	Stations (IOI20_stations)	C++17	0 / 100	807 ms	672 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1005;
vector<int> adj[MAXN], lbls;
int ind;
 
void dfs(int x, int par, bool typ){
    if (typ) lbls[x] = ++ind;
    for (int nxt : adj[x]){
        if (nxt == par) continue;
        dfs(nxt, x, !typ);
    }
    if (!typ) lbls[x] = ++ind;
}
 
vector<int> label(int nodes, int maxlbl, vector<int> u, vector<int> v) {
	for (int i = 0; i < nodes; i++) adj[i].clear();
	for (int i = 0; i < nodes - 1; i++){
        int a = u[i], b = v[i];
        adj[a].push_back(b);
        adj[b].push_back(a);
	}
	lbls = vector<int>(nodes, -1);
	ind = -1;
	dfs(0, -1, 1);
	return lbls;
}
 
int find_next_station(int s, int t, vector<int> c) {
    if (s < c[0]){
        if (t < s) return c.back();
        else return *lower_bound(c.begin(), c.end(), t);
    }
    else{
        if (t > s) return c[0];
        else return *(upper_bound(c.begin(), c.end(), t) - 1);
    }
}

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