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

count = 0
if n * 1 % 25 >= 10
  count += n
else
  m + (n * 1) / 25 
  count += (n * 1) % 25
end

if (m * 25) % 100 >= 10
  count += m
else
  l + (m * 25) / 100
  count += (m * 25) % 100 
end

if (l * 100) % 1000 >= 10
  puts count
else
  puts count += (l * 100) % 1000
end