#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,y=0,sum;
	double f=200,k;
	cin>>n>>k;
	sum=n;
	while(sum<f)
	{
		y++;
		sum+=n;
		f=f*(1+k/100);
		if(y>20)
		{
			cout<<"Impossible";
			return 0;
		}
	}
	cout<<y+1;
    return 0;
}