PrisonersLet me tell you a story of a dangerous prison. There were N prisoners in that prison. It is guarante...

Goku's TreeRecently Goku has discovered a rooted tree graph. Gokuâ€™s tree has N nodes, among them node 1 is the ...

Expected ResultA witch has imprisoned Bob in the 1st room of the Central Witchland Hotel. The hotel is weird. All t...

Building the NumberThis is a straightfroward problem. You will be given N. You have to find the expected value of buil...

Morona Virus Arrived"Cover your nose and mouth with a bent elbow or tissue when you sneeze or cough." World ha...

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