#!/usr/bin/env pypy3

# université pierre et marie curie - c. dürr - 2017
# http://www-desir.lip6.fr/~durrc/Iut/cpa/tme5-progdyn/

# somme d'entiers
# algorithme: ad-hoc
# complexité: linéaire

from sys import stdin

def readint():
    return int(stdin.readline())

def readints():
    return map(int, stdin.readline().split())


n = readint()
total = 0
for _ in range(n):
    total += readint()
print(total)