#include <bits/stdc++.h>
using namespace std;
double n,k,f=200,nn;
int main () {
    cin >>n >>k;
    nn=n;
    if (n>=200){
        cout<<1;
        return 0; 
    }
    for (int i=1;i<=19;i++){
        nn+=n;
        f+=f *(k/100);
        if (nn>=f){
            cout <<i+1;
            return 0;
        }
    }
    cout <<"Impossible";
    return 0;
}