Codeforces Round 919 (Div. 2)

比赛录屏

https://www.bilibili.com/video/BV1rC4y1Y7Jy/?vd_source=9a4bbd69c77feaab80f2e4e19721de57

A. Satisfying Constraints

https://codeforces.com/contest/1920/submission/241422719

B. Summation Game

https://codeforces.com/contest/1920/submission/241431255

C. Partitioning the Array

https://codeforces.com/contest/1920/submission/241446990

D. Array Repetition

https://codeforces.com/contest/1920/submission/241481000