P,Q,A=map(int,input().split())
ANS=0
for i in range(1,2*10**6+1):
    if (100+P)*i//100<(100+Q)*i//100+A:
        ANS+=1

if (100+P)*i//100<(100+Q)*i//100+A:
    print(10**9-(2*10**6-ANS))

else:
    print(ANS)