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A Challenge of codeforces.com/contest/1206/problem/C

Revision en2, by alwcod_nn, 2019-08-23 15:42:56

http://codeforces.com/contest/1206/problem/C

I found a challenge in the editorial (http://codeforces.com/blog/entry/69158) :

Challenge:

For which pairs of (n,k) (n>k≥1) is there an arrangement of numbers from 1 to n on a circle such that the sums of each k consecutive numbers differ by not more than 1 ? ( The problem above is a specify case where n=2*k)

My solution is: - if k is even, there are no n satisfied the condition. - if k is odd, only n=2*k satisfied the condition.

Can someone verify this for me?

Thank you very much....

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en2 English alwcod_nn 2019-08-23 15:42:56 3 Tiny change: 'very much.\n\n' -> 'very much....\n\n'
en1 English alwcod_nn 2019-08-21 11:06:00 608 Initial revision (published)