x,y,a = gets.split.map(&:to_f)
if x > y
  p (1..5000000).count{|c| ((x/100+1)*c).to_i < ((y/100+1)*c).to_i+a}
elsif a > 0
  p 1000000000
elsif x == y
  p 0
else
  p 1000000000 - (1..5000000).count{|c| ((x/100+1)*c).to_i == ((y/100+1)*c).to_i+a}
end