//
// 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 atof(s string) float64 { v, _ := strconv.ParseFloat(s, 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 (_ = fmt.Println; _red = bufio.NewScanner(os.Stdin); _tok []string)
func init() { _red.Buffer(make([]byte, 1e7), 1e7) }
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 *float64: t, _ := gettok(); *v = atof(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 *[]float64:
			if len(*v) == 0 { for { t, e := gettok(); *v = append(*v, atof(t)); if e { break } }
			} else { for j := range *v { t, _ := gettok(); (*v)[j] = atof(t) } }
		case *[]string:
			if len(*v) == 0 { *v = append(*v, _tok...); _tok = _tok[:0]
			} 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)
}