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