#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m;
	cin>>n>>m;
	int sum=n;
	long long a=1;
	double c=200;
	while(sum<c){
		a++;
		sum+=n;
		c=c+c*m/100.0;
		if(a>20){
		cout<<"Impossible";
		}
	}
		cout<<a;
	return 0; 
}