题解 | 买房子

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

int main()
{
    int N;
    float K;
    while(cin>>N>>K)
    {
        int k = 1;
        float sum = 200.00;
        int num = N;
        while(num<sum)
        {
            k++;
            num = k * N;
            sum = sum*(1+K/100.00);
            if(k>21)
            {
                cout<<"Impossible"<<endl;
                break;
            }
        }
        if(k<=21)cout<<k<<endl;
    }
}