> import java.io.*;
> import java.util.*;
> public class Main
> {
> 	private int total=0;
> 	private int temp=0;
> 	private int weightings=0;
> 	private boolean Is_first=true;
> 	private boolean Unequal=false;
> 	private int data[]=null;
> 	private int value[]=null;
> 	private char ch;
> 	public static void main(String args[])
> 	{
> 		new Main();
> 	}
> 	public Main()
> 	{
> 		Scanner in=new Scanner(System.in);
> 		total=in.nextInt();
> 		weightings=in.nextInt();
> 		
> 		data=new int[total];
> 		value=new int[total];
> 		int i=0;
> 		
> 		while(i<weightings)
> 		{
> 			temp=in.nextInt();
> 			for(int j=0;j<2*temp;j++)
> 			{
> 				value[j]=in.nextInt();
> 			}
> 			
> 			String s=null;
> 			while((s=in.nextLine()).equals("")||s==null);
> 			
> 			ch=s.charAt(0);
> 			
> 			for(int j=0;j<2*temp;j++)
> 			{
> 				switch(ch)
> 				{
> 					case '>':
> 					if(Is_first)
> 					{
> 						if(j<temp)
> 						{
> 							data[value[j]-1]=2;
> 						}
> 						else
> 						{
> 							data[value[j]-1]=1;
> 						}
> 					}
> 					else
> 					{
> 						if(j<temp&&data[value[j]-1]!=2)
> 						{
> 							data[value[j]-1]=-1;
> 						}
> 						else if(j>=temp&&data[value[j]-1]!=1)
> 						{
> 							data[value[j]-1]=-1;
> 						}
> 					}
> 					Unequal=true;
> 					break;
> 					case '<':
> 					if(Is_first)
> 					{
> 						if(j<temp)
> 						{
> 							data[value[j]-1]=1;
> 						}
> 						else
> 						{
> 							data[value[j]-1]=2;
> 						}
> 					}
> 					else
> 					{
> 						if(j<temp&&data[value[j]-1]!=1)
> 						{
> 							data[value[j]-1]=-1;
> 						}
> 						else if(j>=temp&&data[value[j]-1]!=2)
> 						{
> 							data[value[j]-1]=-1;
> 						}
> 					}
> 					Unequal=true;
> 					break;
> 					case '=':
> 					data[value[j]-1]=-1;
> 					Unequal=false;
> 					break;
> 				}
> 				
> 			}
> 			i++;
> 			if(Is_first&&Unequal)
> 			{
> 				Is_first=false;
> 			}
> 			else if(Unequal)
> 			filter();
> 		}
> 		print();				
> 	}
> 	private void filter()
> 	{
> 		for(int j=0;j<total;j++)
> 		{
> 			if(data[j]==1||data[j]==2)
> 			{
> 				if(find(j+1))
> 				data[j]=-1;
> 			}
> 		}
> 	}
> 	private boolean find(int i)
> 	{
> 		for(int j=0;j<2*temp;j++)
> 		{
> 			if(value[j]==i)
> 			return false;
> 		}
> 		return true;
> 	}
> 	private void print()
> 	{
> 		int i=-1;
> 		int x=-1;
> 		for(int j=0;j<total;j++)
> 		{
> 			if(data[j]==0&&i==-1)
> 			{
> 				i=j+1;
> 			}
> 			else if(data[j]>=1)
> 			{
> 				if(i==-1)
> 				i=j+1;
> 				else if(data[i-1]>0)
> 				{
> 					System.out.println(0);
> 					return;
> 				}
> 			}
> 		}
> 		if(i==-1)
> 		System.out.println(0);
> 		else
> 		System.out.println(i);
> 	}
> 
> }