#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

int main(){
  ll P, Q, A;
  cin >> P >> Q >> A;

  if(P==Q){
    if(A==0) cout << 0 << endl;
    else cout << 1000000000 << endl;
  }else if(P<Q){
    ll ret = 1000000000;
    for(ll x = 1; x <= 10000000; x++){
      ll X = (100 + P) * x / 100.0;
      ll Y = (100 + Q) * x / 100.0;
      if(X == Y+A) ret--;
    }          
    cout << ret << endl;
  }else if(P>Q){
    ll ret = 0;
    for(ll x = 1; x <= 10000000; x++){
      ll X = (100 + P) * x / 100.0;
      ll Y = (100 + Q) * x / 100.0;
      if(X < Y+A) ret++;
    }      
    cout << ret << endl;
  }
  
  return 0;
}