l = gets.chomp!.to_i
m = gets.chomp!.to_i
n = gets.chomp!.to_i

count = 0
if n * 1 < 25
  count += n
else
  m += (n * 1) / 25 
  count += (n * 1) % 25 / 1
end

if m * 25 < 100
  count += m
else
  l += (m * 25) / 100
  count += (m * 25) % 100 / 25
end

if l * 100 < 1000
  puts count
else
  count += (l * 100) % 1000 / 100
  puts count
end