#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,c;
	cin>>a>>b;
	
	if(b>a)
	{
		c=b-a; 
		c=b/10;
	}
	if(b%10>0)
	{
		c+=1;
	}
	cout<<c;

	return 0;
}