题解 | #买房子#

#include<bits/stdc++.h>
using namespace std;
int main(){
	int N;
	int k;
	int i;
	double wage;
	double price;
	while(scanf("%d%d",&N,&k)!=EOF){
		for(i=2;i<=21;i++){
			price=200*pow(1+k*0.01,i-1);
			wage=N*i;
			if(wage>=price){
				cout<<i<<endl;
				break;
			}	
		}
		if(i>21){
			cout<<"Impossible"<<endl;	
		}	
	}
	
	return 0;
}