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By cf_blogger, history, 7 days ago, In English

Below is the discussion thread to discuss all doubts/alternative solutions/better explanations for Problem D of Round #704.

 
 
 
 
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7 days ago, # |
  Vote: I like it 0 Vote: I do not like it

Can someone please explain the proof to-

It's not difficult to prove that the answer does not exist when k>a+b−2.

How to solve if the condition that $$$k<=a$$$ is not met?

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7 days ago, # |
  Vote: I like it +19 Vote: I do not like it

Why do people downvote it? That's what cf needs, discussion threads for the problems