Educational Round 6A (0/500)

Hello Codebreaker! This is the division 2 half of educational round 6. This round consists of five problems that are on the easier side (relative to educational rounds). This contest also serves as a practice contest for AIO, recommended duration is 3.5h. The problems are authored by oolimry, errorgorn, ft. jamessng for preparing borrowed Tuymaada problems. Editorial: https://docs.google.com/presentation/d/1o2N8XGab5dg03RV_LqbrTY0wUDFs-xMiXP7BQxPAINM/edit?usp=sharing Have fun!