Created
November 23, 2014 08:11
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| f = [] | |
| ff = set([]) | |
| for _ in xrange(int(raw_input())): | |
| i = raw_input().split() | |
| f.append(i[0]) | |
| ff = ff.union(set(i[2: ])) | |
| for i in f: | |
| try: | |
| ff.remove(i) | |
| except KeyError: | |
| pass | |
| print len(ff) |
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