[Codeforces] Round 1011(Div.2) Review(A~D)

https://codeforces.com/contest/2085 I solved 2 problems(A, B), and upsolved 2 problems(C, D). A - Serval and String Theory (greedy, implementation) I struggled with solving A. it took 20 minutes, which is long-time for general A problems. Approach Tr...