p,q,a=map(int,input().split())
ok=0
for m in range(1,2000001):
  ok+=(100+p)*m//100<(100+q)*m//100+a
if a==0:
  ok+=[0,10**9-2000000][p<q]
if a>0 and p<=q:
  ok=10**9
print(ok)