Hi, coders! I, XGN, welcome you to LSS 4, the super easy contest.
Contest Detail:

1. Start at 2020/3/2 and deadline is the weekend after English Extra Exam is finished.
2. Contest Duration: 1h
3. Problem Count: 4
4. Score Distribution: 50+50+100+100
5. Difficulty: around d2C
6. Character: XGN,Ookami,Doragon,Ninetail
7. Address: HHSOJ Essential

I hope you enjoy the contest!

Editorial

Problem A - Dandelion

Reading:BBD
Problem is too easy. Read code if you have any problem:
Code

Problem B - Dandelion 2

Problem is too easy. Read code if you have any problem:
Code

Problem C - Tail Bilboard

Problem is too easy. Read code if you have any problem:
Code

Problem D - The war

Problem is too easy. Read code if you have any problem:
Code