package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	var n, sum int64

	fmt.Scan(&n)
	r := bufio.NewReader(os.Stdin)
	b, _, _ := r.ReadLine()

	ss := strings.Split(string(b), " ")
	for _, v := range ss {
		x, _ := strconv.ParseInt(v, 10, 64)
		sum += x
	}

	fmt.Println(sum)
}