import sys
import itertools


def resolve(in_):
    N = int(next(in_))
    A = tuple(int(line) for line in itertools.islice(in_, N))
    assert N == len(A)

    ans = sum(A)
    return ans

def main():
    ans = resolve(sys.stdin.buffer)
    print(ans)


if __name__ == '__main__':
    main()