from math import floor

P, Q, A = map(int, input().split())

if P == Q:
    if A > 0:
        print(10**9)
    else:
        print(0)
    exit()

if P < Q:
    if A > 0:
        print(10**9)
        exit()
    else:
        ng = 0
        for i in range(1, 1000):
            if floor(P*i/100) == floor(Q*i/100):
                ng += 1
        print(10**9-ng)
        exit()


ans = 0
for mod in range(100):
    p = floor(P*mod/100)
    q = floor(Q*mod/100)
    k0 = 1 if mod == 0 else 0
    for k in range(k0, A+1):
        if P*k + p < Q*k + q + A:
            ans += 1
        else:
            break

print(ans)