C++题解

C++代码：

#include <iostream>
using namespace std;
int main(){
    int n;float k;
    cin>>n>>k;
    int a=0,y=1;
    float s=200.0;
    while (y<=20){
        a+=n;
        if (a>=s){
           cout<<y;
           return 0;
        }
        s*=(1+k/100.0);
        y++;
    }
    cout<<"Impossible";
    return 0;
}