sum=Array.new()
ans=0
for i in 1..31 do
    sum.push("#{i}".chars[0].to_i+"#{i}".chars[1].to_i)
end

day31=[1,3,5,7,8,1,3]
day30=[4,6,9,2]
day28=[2]

for i in day31 do
    ans+=sum.count(i)
end

for i in day30 do
    ans+=sum.first(30).count(i)
end

for i in day28 do
    ans+=sum.first(28).count(i)
end
puts ans