题解 | #买房子#

#include <iostream>

using namespace std;
int main(){
    int n;
    double k;
    while (cin>>n>>k){
        int year = 1;
        int savings = n;
        double price = 200;
        while (savings<price){
            savings+=n;
            price*=(1+k/100);
            year++;
            if (year>21) break;//记得一定要加这一句，不然就无限循环了
        }
        if (year<=21){
            cout<<year<<endl;
        }
        else{
            cout<<"Impossible"<<endl;
        }
    }
}