记录一下做过的atcoder的题目，方便复习回顾。

ABC:

ABC097 D – Equals

ABC213 A – Bitwise Exclusive Or

ABC213 B – Booby Prize

ABC213 C – Reorder Cards

ABC213题解记录

ABC214 A – New Generation ABC

ABC214 B – How many?

ABC214 C – Distribution

ABC214题解记录

ABC216 A – Signed Difficulty

ABC216 B – Same Name

ABC216 C – Many Balls

ABC216 D – Pair of Balls

ABC216题解记录

ABC217 A – Lexicographic Order

ABC217 B – AtCoder Quiz

ABC217 C – Inverse of Permutation

ABC217题解记录

ABC218 A – Weather Forecast

ABC218 B – qwerty

ABC261 F – Sorting Color Balls

ABC273 A – A Recursive Function

ABC273 B – Broken Rounding

ABC273 C – (K+1)-th Largest Number

ABC273 D – LRUD Instructions

ABC274 A – Batting Average

ABC274 B – Line Sensor

ABC274 C – Ameba

ABC274 D – Robot Arms 2

ABC274 E – Booster

ABC276 D – Divide by 2 or 3

ABC276 E – Round Trip

ABC276 F – Double Chance

ABC277 A – ^{-1}

ABC277 B – Playing Cards Validation

ABC277 C – Ladder Takahashi

ABC277 D – Takahashi’s Solitaire

ABC277 E – Crystal Switches

ARC:

ARC097 D – Equals

ARC151 A – Equal Hamming Distances