ICPC 2019 World Finals（Codeforces Gym 102511）部分题目的题解：
A. Azulejos
B. Beautiful Bridges
D. Circular DNA
E. Dead-End Detector
G. First of Her Name
H. Hobsons' trains
J. Miniature Golf

ICPC 2018 World Finals（Codeforces Gym 102482）部分题目的题解：
A. Catch the Plane
B. Comma Sprinkler
E. Getting a Jump on Crime
H. Single Cut of Failure
I. Triangles