#include <iostream>
using namespace std;
int main(){
  int a,b,c;cin>>a>>b>>c;
  double A = (double)(100+a)/100;
  double B = (double)(100+b)/100;
  int ans = 0;
  int Y,Z;
  for(int i = 1; Y <= Z; i++){
    Y = i*A;
    Z = i*B+c;
    if((int)Y < Z){
      //cout << i << ": " << i*A << "(" << Y << ") " << i*B+c << "(" << Z << ")" << endl;
      ans++;
    }
  }
  cout << ans << endl;
  

}