题解 | 买房子

#include <iostream>
using namespace std;

int main() {
    int n;
    double k;
    while (cin >> n >> k) {
        int price = 200;
        int salary = 0;
        bool afford = false;
        for (int i = 1; i <= 21; i++) {
            salary += n;
            if (salary >= price) {
                afford = true;
                cout << i << endl;
                break;
            }
            price = 1.0 * price * (1+ k / 100);
            
        }
        if (!afford)cout << "Impossible" << endl;
    }
}
// 64 位输出请用 printf("%lld")