P, Q, A = map(int, input().split()) cnt = 0 INF = 4 * 10 ** 6 for x in range(1, INF + 1): if (x * P) // 100 >= (x * Q) // 100 + A: cnt += 1 if cnt < INF // 2 : print(10 ** 9 - cnt) else: print(INF - cnt)