using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (p, q, a) = (c[0], c[1], c[2]);
        var max = 1_000_000_000;
        if (p == q)
        {
            if (a == 0) WriteLine(0);
            else WriteLine(max);
        }
        else if (p < q)
        {
            if (a == 0)
            {
                var count = 0;
                for (var i = 1; i <= 100; ++i) if (p * i / 100 < q * i / 100) ++count;
                WriteLine(max - 100 + count);
            }
            else WriteLine(max);
        }
        else
        {
            var count = 0;
            for (var i = 1; i <= 1_000_000; ++i) if (p * i / 100 < q * i / 100 + a) ++count;
            WriteLine(count);
        }
    }
}