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


def check(n):
    return (n * p) // 100 < (n * q) // 100 + a


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