#include <iostream>
int main()
{
    constexpr int max = 1000000000;
    int p, q, a;
    std::cin >> p >> q >> a;
    const int rep = 100 * (a + 1);
    int ans       = 0;
    for (int x = 1; x <= rep; x++) {
        if (x * p / 100 < x * q / 100 + a) { ans++; }
    }
    if (p < q or (p == q and a > 0)) { ans += (max - rep); }
    std::cout << ans << "\n";
    return 0;
}