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