题目1158：买房子

#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <math.h>
#include <string>
#include <string.h>
#include <vector>
#include <queue>
#include <stack>
#include <sstream>
#include <climits>
#include <cstring>
using namespace std;
//1158
int n,k,ans,f;
int main(){
   // freopen("input.txt","r",stdin);
    while(cin>>n>>k){
        double t=(k+100)/100.0;
        int i;
        for(i=1;i<21;i++){
           ans=n*i;
           f=200*pow(t,i-1);
           //cout<<"ans="<<ans<<" "<<"f="<<" "<<f<<endl;
           if(ans>=f){
                cout<<i<<endl;
                break;
           }
        }
        if(i>20)    cout<<"Impossible"<<endl;
    }
    return 0;
}
/**************************************************************
    Problem: 1158
    User: cust123
    Language: C++
    Result: Accepted
    Time:0 ms
    Memory:1608 kb
****************************************************************/