class FindTotalValue
    attr_reader :n, :a

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

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

    def dataoutput
        puts @a.inject(:+)
    end

    def run
        datainput
        dataoutput
    end
end

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