[ABC172F] Unfair Nim

[ABC173A] Payment

[ABC173B] Judge Status Summary

[ABC173C] H and V

[ABC173D] Chat in a Circle

[ABC173E] Multiplication 4

[ABC173F] Intervals on Tree

[ABC174A] Air Conditioner

[ABC174B] Distance

[ABC174C] Repsept

[ABC174D] Alter Altar

[ABC174E] Logs

二分

[ABC174F] Range Set Query

莫队 · 分块 · 离线处理

[ABC175A] Rainy Season

[ABC175B] Making Triangle

[ABC175C] Walking Takahashi

[ABC175D] Moving Piece

[ABC175E] Picking Goods

[ABC175F] Making Palindrome

[ABC176A] Takoyaki

[ABC176B] Multiple of 9

[ABC176C] Step

[ABC176D] Wizard in Maze

[ABC176E] Bomber

[ABC176F] Brave CHAIN

动态规划 DP · 动态规划优化 · 状态合并 · STL

[ABC177A] Don't be late

[ABC177B] Substring

[ABC177C] Sum of product of pairs

[ABC177D] Friends

[ABC177E] Coprime

[ABC177F] I hate Shortest Path Problem

[ABC178A] Not

[ABC178B] Product Max

[ABC178C] Ubiquity

模拟 · 数学 · 组合数学 · 容斥原理

[ABC178D] Redistribution

[ABC178E] Dist Max

[ABC178F] Contrast

[ABC179A] Plural Form

[ABC179B] Go to Jail

[ABC179C] A x B + C

[ABC179D] Leaping Tak

[ABC179E] Sequence Sum

[ABC179F] Simplified Reversi

[ABC180A] box

[ABC180B] Various distances

[ABC180C] Cream puff

[ABC180D] Takahashi Unevolved

[ABC180E] Traveling Salesman among Aerial Cities

[ABC180F] Unbranched

动态规划 DP · 组合数学 · 差分

[ABC181A] Heavy Rotation