Submission #831151

#	Time	Username	Problem	Language	Result	Execution time	Memory
831151		Baytoro	Stations (IOI20_stations)	C++17	0 / 100	1175 ms	2097152 KiB

stations

#include "stations.h"
//#include "stub.cpp"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=1005;
vector<int> g[N];
int used[N];
int cnt;
void dfs(int x, int D, vector<int> &v){
	if(D%2==0)
		v[x]=cnt++;
	for(auto it: g[x]){
		if(used[it]) continue;
		dfs(it,D+1,v);
	}
	if(D%2)
		v[x]=cnt++;
}
vector<int> label(int n, int k,vector<int> u, vector<int> v) {
	for(int i=0;i<n-1;i++){
		g[u[i]].pb(v[i]);
		g[v[i]].pb(u[i]);
	}
	vector<int> ans(n,0);
	used[0]=1;
	dfs(0,0,ans);
	return ans;
}

int find_next_station(int s, int t, vector<int> c) {
	if(s>=c.back()){
		if(t>s || t<c[0]) return c[0];
		return c[int(lower_bound(c.begin(),c.end(),t+1)-c.begin())-1];
	}
	else{
		if(t<s || t>c.back()) return c.back();
		return c[int(lower_bound(c.begin(),c.end(),t)-c.begin())];
	}
}

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