Submission #310323

#	Time	Username	Problem	Language	Result	Execution time	Memory
310323		Peacher29	Stations (IOI20_stations)	C++14	100 / 100	1184 ms	1028 KiB

stations

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

using namespace std;

class pont{
public:
	vector<int> v;
	bool volt = 0;
	int id=-1;
	int ind;
	void dfs(bool mi);
};

int dd;
vector<pont> p;
vector<int> er;

void pont::dfs(bool mi){
	if(!volt){
		volt=1;
		if(!mi)
			er[ind]=++dd;
		for(int i : v)
			p[i].dfs(!mi);
		if(mi)
			er[ind]=++dd;
	}
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	p.clear();
	p.resize(n);
	er.resize(n);
	dd=-1;
	for(int i=0;i<n-1;i++){
		p[i].ind=i;
		p[u[i]].v.push_back(v[i]);
		p[v[i]].v.push_back(u[i]);
	}
	p[n-1].ind=n-1;
	p[0].dfs(0);
	return er;
}
int find_next_station(int s, int t, vector<int> c) {
	if(c.size()==1)
		return c[0];
	sort(c.begin(), c.end());
	if(s<c[0]){
		if(t<s || c[c.size()-2]<t)
			return c[c.size()-1];
		for(int i=0;i<=c.size()-2;i++)
			if(t<=c[i])
				return c[i];
	} else {
		if(t>s || c[1]>t)
			return c[0];
		for(int i=c.size()-1;i>=(s!=0);i--)
			if(c[i]<=t)
				return c[i];
	}
	exit(255);
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:52:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |   for(int i=0;i<=c.size()-2;i++)
      |               ~^~~~~~~~~~~~

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