#include<bits/stdc++.h> using namespace std; int main() { double n,k,a=200,b,m=0; cin >> n >> k; b = n; while(a>n) { m++; a += k0.01a; n += b; if(m>20) { break; } } if(m>20) { cout << "Impossible"; } else cout << m+1; return 0; }