#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using ul = unsigned long;
using ull = unsigned long long;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	ll p, q, a, res{ 0 };
	cin >> p >> q >> a;

	if (p == q)
		res = a == 0 ? 0 : 1000000000;
	else if (p < q)
	{
		res = 1000000000;

		for (ll i = 1; i <= 100 * (a + q - p + 1) / (q - p); ++i)
		{
			if ((100 + p) * i / 100 >= (100 + q) * i / 100 + a)
				--res;
		}
	}
	else
	{
		for (ll i = 1; i<= 100 * (a + p - q + 1) / (p - q); ++i)
		{
			if ((100 + p) * i / 100 < (100 + q) * i / 100 + a)
				++res;
		}
	}

	cout << res << "\n";

	return 0;
}