import sys

sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


P,Q,A = MI()

if P < Q:
    if A != 0:
        print(10**9)
    else:
        ans = 10**9
        for i in range(1,100//(Q-P)+1):
            if ((100+P)*i)//100 == ((100+Q)*i)//100:
                ans -= 1
        print(ans)
elif P == Q:
    if A != 0:
        print(10**9)
    else:
        print(0)
else:
    ans = 0
    for i in range(1,(100*(A+1))//(P-Q)+1):
        if ((100+P)*i)//100 < A+((100+Q)*i)//100:
            ans += 1
    print(ans)