# Input consists of a sequence of integers.
# The first in the sequence denotes how many integers to follows.
# Write a program that reads in this sequence of numbers
# and prints out the sum of the integers that follows the first.

n = int(input())
i = 1
acc = 0
while i <= n:
    a_i = int(input())
    acc += a_i
    i += 1
print(acc)