#yuki928

p,q,a=map(int,raw_input().split())
res=0
for i in range(1,2*10**6+1):
 if (100+p)*i/100<(100+q)*i/100+a:
  res+=1
if (100+p)*2*10**4<(100+q)*2*10**4+a:
 print 10**9-(2*10**6-res)
else:
 print res