A secret can be told only to 2 persons in 5 minutes. Now, these 2 more persons can spread the secret to 4 other people in the next 5 minutes. this way continues... So How long will it take to spread the secret to n persons? Output will be for two scenarios -

  • z(1) -- each person can continue spreading the secret
  • z(2) -- each person can tell the secret to only two persons

n.b. outputs can only be multiples of 5.

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Last Solution submitted on Sep 29, 2026

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