AtCoder Grand Contest 007 review

Link AGC 007 top page Editorial I felt you need more invetiveness/creativeness in this contest, and it was difficult.  A – Shik and Stone Problem Compared to ARC (regular contest), it is slightly difficult even from problem A. The most elegant solution is to just check the number of ‘#’ is equal to \(W+H-1\) or […]

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AtCoder Regular Contest 063 review

Link ARC 063 top page Editorial C – 一次元リバーシ / 1D Reversi Problem  

D – 高橋君と見えざる手 / An Invisible Hand Problem I didn’t notice that there is a restriction that each \(A_i \) is different. So it took time for implementation.

  E – 木と整数 / Integers on a Tree Problem Follow […]

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Codeforces Round #378 Div. 2 review

Link Codeforces Round #378 Div. 2 (Contest 733) A. Grasshopper And the String Link: Problem Category: Implementation Even this is a first problem, I get wrong answer for first time submission. It is necessary to consider a corner case at the “end of the text”. Some other solution is inserting extra ‘A’ at the end of text so […]

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