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 ...
Author: corochann
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...
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 g...
Codeforces Round #377 Div. 2 review
Link Codeforces Round #377 Div. 2 (Contest 732) A. Buy a Shovel Problem It can be paid without change if the change is 0 or \(r\). B. Cormen — The Best Fri...
AtCoder Regular Contest 062 review
Link ARC 062 top page Editorial C – AtCoDeerくんと選挙速報 / AtCoDeer and Election Report Problem D – AtCoDeerくんと変なじゃんけん / AtCoDeer and Rock-Paper Problem E – AtCoDeer...
Topcoder SRM 699 Div2 review
Single Round Match 699 Sponsored by Cisco Statistics – Problem Editorial Div II Level One: UpDownHiking Idea is same with editorial. Div II Level Two: Last...
Codeforces Round #374 Div. 2 review
Link Codeforces Round #374 Div. 2 (Contest 721) Editorial A. One-dimensional Japanese Crossword Problem Just count consecutive ‘B’ in the sequence. B. Pass...
Codeforces Round #373 Div. 2 review
Link Codeforces Round #373 Div. 2 (Contest 719) A. Vitya in the Countryside Problem Basically, check last 2 character to determine its direction is “UP” or...
Codeforces Round #368 Div. 2 review
Link Codeforces Round #368 Div. 2 (Contest 707) A. Brain’s Photos Problem Just need to check if color (Cyan, Magenta or Yellow) exists or not in the photo....
scanf and printf are much faster than cin and cout
When I’m solving the Codeforces problem, 707D. Persistent Bookcase, I made some comparison for the performance of I/O function. scanf() and print...