package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd:=bf.NewReader(Stdin)
	var n int
	Fscan(rd,&n)
	a:=make([]int64,n)
	var c int64
	for i:=range a {
		Fscan(rd,&a[i])
		c+=a[i]
	}
	Println(c)
}