[ABC147F] Sum Difference

[ABC148A] Round One

[ABC148B] Strings with the Same Length

[ABC148C] Snack

[ABC148D] Brick Break

[ABC148E] Double Factorial

[ABC148F] Playing Tag on Tree

[ABC149A] Strings

[ABC149B] Greedy Takahashi

[ABC149C] Next Prime

[ABC149D] Prediction and Restriction

[ABC149E] Handshake

二分

[ABC149F] Surrounded Nodes

[ABC150A] 500 Yen Coins

[ABC150B] Count ABC

[ABC150C] Count Order

枚举 · 排列组合

[ABC150D] Semi Common Multiple

[ABC150E] Change a Little Bit

数学 · 组合数学

[ABC150F] Xor Shift

[ABC151A] Next Alphabet

[ABC151B] Achieve the Goal

[ABC151C] Welcome to AtCoder

[ABC151D] Maze Master

广度优先搜索 BFS

[ABC151E] Max-Min Sums

数学 · 组合数学

[ABC151F] Enclose All

计算几何

[ABC152A] AC or WA

[ABC152B] Comparing Strings

[ABC152C] Low Elements

[ABC152D] Handstand 2

[ABC152E] Flatten

[ABC152F] Tree and Constraints

容斥原理

[ABC153A] Serval vs Monster

[ABC153B] Common Raccoon vs Monster

[ABC153C] Fennec vs Monster

[ABC153D] Caracal vs Monster

[ABC153E] Crested Ibis vs Monster

[ABC153F] Silver Fox vs Monster

贪心 · 二分 · 离散化 · 差分

[ABC154A] Remaining Balls

[ABC154B] I miss you...

[ABC154C] Distinct or Not

[ABC154D] Dice in Line

[ABC154E] Almost Everywhere Zero

枚举

[ABC154F] Many Many Paths

组合数学

[ABC155A] Poor

[ABC155B] Papers, Please

[ABC155C] Poll

[ABC155D] Pairs

[ABC155E] Payment

[ABC155F] Perils in Parallel

图论建模 · 差分

[ABC156A] Beginner