p,q,a = map(int,input().split())
ans = 0
for i in range(1,101):
    v = (100+p)*i//100
    w = (100+q)*i//100
    w += a-v
    c = p-q
    # cx < w? (for 0 <= x < 10**7)
    if c==0:
        ans += 10**7 if w > 0 else 0
    elif c<0:
        c,w = -c,-w
        # cx > w?
        ans += max(10**7-(w//c+1),0)
    else:
        # cx < w?
        ans += max(0,min(10**7,(w+c-1)//c))
print(ans)