import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)

p, q, a = map(int, readline().split())
cnt = 10 ** 9 - (10 ** 6 + a) if (10 ** 9 * p) // 100 < (10 ** 9 * q) // 100 + a else 0
for i in range(1, 10 ** 6 + a + 1):
    cnt += 1 if (i * p) // 100 < (i * q) // 100 + a else 0
print(cnt)