Submission #320466

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
320466	2020-11-08T20:09:38 Z	Ambok	Stations (IOI20_stations)	C++14	Compilation error	0 ms	0 KB

stations

#include <bits/stdc++.h>
using namespace std;
int coun=0;
vector <int> label(int n, int k, vector <int> u, vector <int> v)
{
	vector < vector <int> > vec(n);
	vector <int> L(n);
	int s, h, i;
	
	void dfs (int s, int h);
	{
		if (h%2==0) L[s]=coun;
		coun++;
		for (int i=0; i<vec[s].size(); i++)
		dfs(vec[s][i], h+1);
	
		if (h%2==1) L[s]=coun;
		h--; coun++;
	}
	
	for (i=0; i<n; i++)
	{
		vec[u[i]].push_back(v[i]);
	}
	L[0]=0;
	dfs (0, 0);
	
	return L;
}
int find_next_station(int s, int t, vector <int>c)
{
	int n=c.size(), i;
	int in[n+1], out[n+1];
	
	if (s>c[n-1])
	{
		in[n]=c[1]-1;
		out[n]=s;
		
		for (i=0; i<n; i++)
		in[i]=c[i];
		
		for (i=1; i<n; i++)
		{
			out[i]=in[i+1]-1;
		}
		if (t>in[n] && t<out[n])
		{
			for (i=1; i<n; i++)
			{
				if (t>=in[i] && t<=out[i]) return c[i];
			}
		}
		else return c[0];
	}
	else 
	{
		in[n]=s;
		out[n]=c[n-2]+1;
		
		for (i=0; i<n; i++)
		out[i]=c[i];
		in[0]=s+1;
		for (i=1; i<n; i++)
		{
			in[i]=out[i-1]+1;
		}
		
		if (t>in[n] && t<out[n])
		{
			for (i=0; i<n-1; i++)
			{
				if (t>=in[i] && t<=out[i]) return c[i];
			}
		}
		else return c[n-1];	
	}
}

Compilation message

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:14:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |   for (int i=0; i<vec[s].size(); i++)
      |                 ~^~~~~~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:78:1: warning: control reaches end of non-void function [-Wreturn-type]
   78 | }
      | ^
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:12:10: warning: 'h' may be used uninitialized in this function [-Wmaybe-uninitialized]
   12 |   if (h%2==0) L[s]=coun;
      |       ~~~^~~
stations.cpp:12:18: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
   12 |   if (h%2==0) L[s]=coun;
      |                  ^
/tmp/cc5v6BvH.o: In function `label(int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)':
stations.cpp:(.text+0x317): undefined reference to `dfs(int, int)'
stations.cpp:(.text+0x3c3): undefined reference to `dfs(int, int)'
collect2: error: ld returned 1 exit status