[ABC197F] Construct a Palindrome

广度优先搜索 BFS

[ABC198A] Div

[ABC198B] Palindrome with leading zeros

[ABC198C] Compass Walking

[ABC198D] Send More Money

[ABC198E] Unique Color

[ABC198F] Cube

[ABC199A] Square Inequality

[ABC199B] Intersection

[ABC199C] IPFL

[ABC199D] RGB Coloring 2

[ABC199E] Permutation

状压 DP

[ABC199F] Graph Smoothing

[ABC200A] Century

[ABC200B] 200th ABC-200

[ABC200C] Ringo's Favorite Numbers 2

[ABC200D] Happy Birthday! 2

[ABC200E] Patisserie ABC 2

数学 · 容斥原理

[ABC200F] Minflip Summation

[ABC201A] Tiny Arithmetic Sequence

[ABC201B] Do you know the second highest mountain?

[ABC201C] Secret Number

[ABC201D] Game in Momotetsu World

[ABC201E] Xor Distances

[ABC201F] Insertion Sort

[ABC202A] Three Dice

[ABC202B] 180°

[ABC202C] Made Up

[ABC202D] aab aba baa

[ABC202E] Count Descendants

[ABC202F] Integer Convex Hull

动态规划 DP · 计算几何

[ABC203A] Chinchirorin

[ABC203B] AtCoder Condominium

[ABC203C] Friends and Travel costs

[ABC203D] Pond

[ABC203E] White Pawn

[ABC203F] Weed

[ABC204A] Rock-paper-scissors

[ABC204B] Nuts

[ABC204C] Tour

[ABC204D] Cooking

[ABC204E] Rush Hour 2

[ABC204F] Hanjo 2

动态规划 DP · 动态规划优化 · 矩阵加速 · 状压 DP

[ABC205A] kcal

[ABC205B] Permutation Check

[ABC205C] POW

[ABC205D] Kth Excluded

[ABC205E] White and Black Balls

组合数学 · Catalan 数

[ABC205F] Grid and Tokens

[ABC206A] Maxi-Buying