P3452 [POI 2007] BIU-Offices

Bytel is a mobile telephony potentate. Each employee has been issued a company phone, the memory ofwhich holds the numbers of some of his co-workers (all of them have his number in their phones as well). Due to dynamic growth of their operations the board of directors intends to move company headquaters tonew office buildings. It has been decided - in order to boost work efficiency - that every pair of employeesworking in different buildings should know (reciprocally) each others phone number i.e. the memory of theircompany phone ought to hold necessary phone numbers. Simultaneously, the board have decided to rent as many office buildings as possible to ensure good workingconditions. Help the board of Bytel to plan the number of office buildings and their size in accordancewith the aforementioned requirements. ## Task Write a programme which: reads the description of employees' phone number lists from the standard input calculates the maximal number of office buildings and their sizes, satisfying board's conditions writes the outcome to the standard output.

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