from zipfile import ZipFile

with ZipFile('input.zip') as myzip:
    info = myzip.infolist()

files = list()

for i in info:
    files.append(i.orig_filename)
archive = []

for i in files:
    if '/' in i:
        n = -1
        while True:
            n += 1
            if '/' in i:
                if i[:i.index('/')] not in archive:
                    archive.append(i[:i.index('/')])
                    print('  ' * n + i[:i.index('/')])
                i = i[i.index('/') + 1:]
            elif i == '':
                break
            else:
                print('  ' * n + i)
                break
    else:
        print(i)
        archive.clear()