package main

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

func main() {
	var n int
	_, _ = fmt.Scan(&n)

	var str string
	stdin := bufio.NewScanner(os.Stdin)
	if stdin.Scan() {
		str = stdin.Text()
	}

	var sum int64
	for _, s := range strings.Split(str, " ") {
		a, _ := strconv.ParseInt(s, 10, 64)
		sum += a
	}

	fmt.Println(sum)
}