A, B 1056 -> 1001 AtCoder #125 A - Biscuit Generator AtCoder ABC #125 B - Resale AtCoder ABC #125 C - GCD on Blackboard

2000円ぐらいのウェブカメラを買った． マシンは Dell XPS13 （Windows 10） Microsoft HD-3000 www.microsoft.com Logicool C270 www.logicool.co.jp 画質はほとんど変わらない． C270の方が明るく映る． 買うならC270． HD-3000 は結構暗く映る． 明るさは…

A, B 1207 -> 1300 Codeforces #551 Div2 A - Serval and Bus Codeforces #551 Div2 B - Serval and Toy Bricks Codeforces #551 Div2 C - Serval and Parenthesis Se ...

A, B, C 1074 -> 1065 AtCoder ABC #124 A - Buttons AtCoder ABC #124 B - Great Ocean View AtCoder ABC #124 C - Coloring Colorfully AtCoder ABC #124 D - Handstand

A, B, C 1073-> 1074 AtCoder ABC #123 A - Five Antennas AtCoder ABC #123 B - Five Dishes AtCoder ABC #123 C - Five Transportations AtCoder ABC #123 D - Cake 123