#include <bits/stdc++.h>
using namespace std;

double P, Q;
long long A;

long long pfunc(long long a)
{
    return (long long)((double)a*((double)1.0+P/(double)100));
}

long long qfunc(long long a)
{
    return (long long)((double)a*((double)1.0+Q/(double)100))+A;
}

int main()
{
    cin >> P >> Q >> A;
    long long cnt = 0;
    for(long long i = 1; i <= 10000; i++)
    {
        long long p = pfunc(i);
        long long q = qfunc(i);
        if(p < q) cnt++;
    }

    {
        long long MAX = 1000000000;
        long long p = pfunc(MAX);
        long long q = qfunc(MAX);
        if(p < q) cnt += MAX - 10000;
    }

    cout << cnt << endl;
    return 0;
}