def main():
    sum = 0

    for line in read('adunare.in'):
        sum += int(line)

    return write('adunare.out', sum)


def read(file):
    with open(file, 'r', encoding = 'utf-8') as f:
        lines = f.read().splitlines()

    return lines


def write(file, amount):
    with open(file, 'w', encoding = 'utf-8') as f:
        f.write(str(amount))