//
// author: Leonardone @ NEETSDKASU
package main

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

func atoi(s string) int { v, _ := strconv.Atoi(s); return v }
func atou(s string) uint64 { v, _ := strconv.ParseUint(s, 10, 64); return v }
func max(a, b int) int { if a > b { return a }; return b }
func min(a, b int) int { if a < b { return a }; return b }

var _red = bufio.NewScanner(os.Stdin)
var _tok []string

func gettok() (t string, e bool) {
	if len(_tok) == 0 {
		if !_red.Scan() { return }
		_tok = strings.Split(_red.Text(), " ")
	}
	t = _tok[0]; _tok = _tok[1:]; e = len(_tok) == 0
	return
}

func read(vs ...interface{}) {
	for _, v := range vs {
		switch v := v.(type) {
		case *int: t, _ := gettok(); *v = atoi(t)
		case *uint64: t, _ := gettok(); *v = atou(t)
		case *string: *v, _ = gettok()
		case *[]int:
			if len(*v) == 0 {
				for { t, e := gettok(); *v = append(*v, atoi(t)); if e { break } }
			} else {
				for j := range *v { t, _ := gettok(); (*v)[j] = atoi(t) }
			}
		case *[]uint64:
			if len(*v) == 0 {
				for { t, e := gettok(); *v = append(*v, atou(t)); if e { break } }
			} else {
				for j := range *v { t, _ := gettok(); (*v)[j] = atou(t) }
			}
		case *[]string:
			if len(*v) == 0 {
				for { t, e := gettok(); *v = append(*v, t); if e { break } }
			} else {
				for j := range *v { (*v)[j], _ = gettok() }
			}
		}
	}
}

func main() {
    var n int
    read(&n)
    xs := make([]uint64, n)
    read(&xs)
    sum := uint64(0)
    for _, x := range xs {
        sum += x
    }
	fmt.Println(sum)
}