#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include<bits/stdc++.h>
using namespace std;
#define REP(i,m,n) for(int i=(int)(m) ; i < (int) (n) ; ++i )
#define rep(i,n) REP(i,0,n)

int main(){
    int p,q,a;
    cin>>p>>q>>a;
    int  x[100],y[100];
    rep(i,100){
        x[i] = p*(i+1)/100 - p*i/100 ;
        y[i] = q*(i+1)/100 - q*i/100; 
    }
    rep(i,99)x[i+1]+=x[i], y[i+1]+=y[i];
    int in = 0, out = a;
    int ans = 0;
    REP(i,1,10000001){
        rep(j,100){
            if(in+x[j]<out+y[j])++ans;
        }
        in+=x[99];out+=y[99];
    }
    cout<<ans<<endl;
    return 0;
}