�� : ��
18

def inp(s):
    f = open(s, 'r')
    q = f.readline()
    a = []
    while q != '':
        a.append(q.split())
        q = f.readline()
    return a

def konec(a):
    for i in range(len(a)):
        for j in range(len(a[i])):
            if a[i][j] < 0:
                continue
            if i + 1 < len(a) and 


x = inp('/home/student/��������/18-01.txt')
for i in x:
    print(i)
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