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CF — round 176 — Div 2 — problem B- pipeline
source link: https://codeforces.com/blog/entry/7188
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CF — round 176 — Div 2 — problem B- pipeline
By sntmessages, 10 years ago,
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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