sntmessages's blog

By sntmessages, 12 years ago, In English

i have some doubt about this problem. it is written in the problem statement that "Vova needs the pipeline to have exactly n pipes with flowing out water."

considering this statement the answer for test case : 21 8 is '-1' . since for k=8 number of pipes can be 1,8,14,19,23,26,28,29 and it is written that pipeline should have exactly n pipes with flowing out water, therefore, 21 cant be possible.

i have run custom test and it is showing me o/p as '4'. am i missing something? please help.

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12 years ago, # |
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You can take the 8-way, 7-way, 6-way, and 3-way splitters to get 21 pipes in total.