#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n , k;
    cin >> n >> k;
    double sum = 0 , cnt = 200;
    for(int i = 1;i <= 20;i++)
    {
        if(sum >= cnt)
        {
            cout << i - 1;
            return 0;
        }
        else
        {
            sum += n;
            cnt += 1.0 * k / 100 * cnt;
        }
    }
    cout << "Impossible";
    return 0;
}