import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		double p = sc.nextInt();
		double q = sc.nextInt();
		int a = sc.nextInt();
		sc.close();

		if (a == 0 && p == q) {
			System.out.println(0);
			return;
		}

		int max = 100 * (a + 1);
		int ans = 0;
		for (int i = max; i > 0; i--) {
			int x = (int) ((100 + p) * i / 100);
			int y = (int) ((100 + q) * i / 100);
			if (x < y + a) {
				ans++;
			}
		}
		if (p <= q) {
			System.out.println(1000000000 - max + ans);
		} else {
			System.out.println(ans);
		}
	}
}