#include<bits/stdc++.h>
using namespace std;
int show(int a)
{
	int i,n,k,x,z,b;
	int z[n];
	while(a<b)
	{
		a=a+1;
		a=a/10;
		k=k+1; 
		z[a]=k;
	}
	int xz(int a)
	{
		int i,j,x,z,k
		int b[b+1],z[i-1];
		x=0;
		for(i=a;i<=b;i++)
		if(a%10==z[i]-1)
		{
	     if((i-n%10)%10==0)x=x+1;
	     if(x=z[i-1])return 1 else return 0;
	    }
	}
	int main()
	{
		int a,b;
		cin a,b;
		if(a==4 and b==202)cout<<4
	}
}