B - Voting Judges

Simple but good for coding excercise

D - Semi Common Multiple

  • By substraction we know the delta is the LCM of A
  • By factoring we know the init must be the LCM/2, just need to verify that every number satisfies the condition
  • What got me is how LCM is calculated - just use lcm formula rolling through the A. Other approachs couldn’t handle catches
  • The cnt calc formla can be simplfied to M //(lcm//2) - M // lcm

C - Successive Subtraction

E - Max-Min Sums

E - Friendships

F - Sugoroku

F - Interval Running

C - GCD on Blackboard

B - LRUD Game

E - Sequence Decomposing

D - Maximum Sum of Minimum