class Deposit
    attr_reader :n, :c

    def initialize(n: 0, c: [])
        @n, @c = n, c
    end

    def cause
        begin
            @n = Integer(gets.chomp)
            @c = gets.chomp.split.map { |v| Integer(v) }
        rescue
            
        end
    end

    def deposit(array)
        r = 0
        array.each do |i|
            r += 30 if i <= (array.inject(:+)/10)
        end
        r
    end

    def result
        puts deposit(@c)
    end

    def run
        cause
        result
    end
end

if $0 == __FILE__
    Deposit.new.run
end