#include<bits/stdc++.h>
using namespace std;
int main()
{
	double n;
	double k;
	while(cin>>n>>k)
	{
			double y=1;
	
	double M=200;
		
		double All=n;
	while(true)
	{
		All+=n;
		M*=(1+k/100);
		if(All>M)
		{
			cout<<y+1<<endl;
			break; 
		}
		if(y>19)
		{
		cout<<"Impossible"<<endl;
		break;
		}
		y++;
	}
}
	return 0;
 }