#include <iostream>
using namespace std;
int main(){
int i;
double N,K, M = 200;
cin >> N >> K;
for (i=1;i<=20;i++){
if (N * i >= M)
break;
M = M * (1 + K/100);
}
if(i<=20)
printf("%d",i);
else
cout << "Impossible" << endl;
return 0;
}