#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<ll> vll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<vector<ll>> vvll;
const ll inf = 1e16;
const ll md = 1000000007;

int main() {
  int p,q,a;
  cin>>p>>q>>a;
  ll ans=0LL;
  int max_d=0;
  rep(x,100){
    int d=(100+q)*x/100-(100+p)*x/100;
    max_d=max(d,max_d);
    if(d+a>0) ans++;
  }
  ll n=100LL;
  while(n<=1000000000){
    int x=n%100;
    int y=n/100;
    int d=(100+q)*x/100-(100+p)*x/100;
    if(y*(p-q)-a<d) ans++;
    if(y*(p-q)-a>max_d) break;
    n++;
  }
  ans--;
  cout<<ans<<endl;
  return 0;
}