#include<bits/stdc++.h>
using namespace std;
int main() {
	int n,k,p = 200;

	cin >> n >> k;
	int cnt = 0;
	for (int i = 1;i <= 20; i++) {
		p+=p/100*k;
		cnt+=n;
		if (cnt >= p) {
			cout << i;
			return 0;
		}
	} 
	cout << "Imopossible";
	return 0;
}