#include<bits/stdc++.h>
using namespace std;
int n,k,t=0,y=1;
double m=200;
int main()
{ 
    

    cin>>n>>k;
    t+=n;   
    while(t<m)
    {
        t+=n;
        m=k/100.0*m+m;
        y++;
        if(y>20)
        {
            cout<<"Impossible";
            return 0;
        }
    }
    cout<<y;
    return 0;
}