v

#include <iostream>
using namespace std;
int main()
{
    double x,y,p;
    int i=0,s=0;
    s=x;

    cin>>x>>p>>y;
    while ( x<y){
        x=x+x*(p/100);
        if(x-s>=1){
            s=x;
        }
       i++;
    }

    cout<<i;
    return 0;
}