[ABC181B] Trapezoid Sum

[ABC181C] Collinearity

[ABC181D] Hachi

[ABC181E] Transformable Teacher

贪心 · 二分 · 前缀和

[ABC181F] Silver Woods

二分 · 并查集

[ABC182A] twiblr

[ABC182B] Almost GCD

[ABC182C] To 3

[ABC182D] Wandering

[ABC182E] Akari

[ABC182F] Valid payments

[ABC183A] ReLU

[ABC183B] Billiards

[ABC183C] Travel

[ABC183D] Water Heater

[ABC183E] Queen on Grid

[ABC183F] Confluence

并查集 · 启发式合并 · STL

[ABC184A] Determinant

[ABC184B] Quizzes

[ABC184C] Super Ryuma

[ABC184D] increment of coins

[ABC184E] Third Avenue

[ABC184F] Programming Contest

折半搜索 meet in the middle

[ABC185A] ABC Preparation

[ABC185B] Smartphone Addiction

[ABC185C] Duodecim Ferra

[ABC185D] Stamp

[ABC185E] Sequence Matching

动态规划 DP

[ABC185F] Range Xor Query

[ABC186A] Brick

[ABC186B] Blocks on Grid

[ABC186C] Unlucky 7

[ABC186D] Sum of difference

[ABC186E] Throne

[ABC186F] Rook on Grid

线段树 · 树状数组

[ABC187A] Large Digits

[ABC187B] Gentle Pairs

[ABC187C] 1-SAT

[ABC187D] Choose Me

[ABC187E] Through Path

[ABC187F] Close Group

[ABC188A] Three-Point Shot

[ABC188B] Orthogonality

[ABC188C] ABC Tournament

[ABC188D] Snuke Prime

[ABC188E] Peddler

[ABC188F] +1-1x2

记忆化搜索

[ABC189A] Slot

[ABC189B] Alcoholic

[ABC189C] Mandarin Orange