#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,k,i,gz;
	cin>>n>>k;
	double sum=200;
	for(i=1;i<=20;i++)
	{
		gz=n*i;
		if(gz>=sum) break;
		sum=sum+sum/100*k;
	}
	if(i>20) cout<<"Impossible\n";
	else cout<<i<<endl;
	return 0;
}