Happy Ladybugs

Solutions This problem can be solved by considering a few things: 1) if a ladybug’s color is unique in the set, the ladybug will never be happy (the solution is “NO”); 2) if 1) does not occur and if there is at least one empty cell, then the solution is always “YES” since it’s always possible to rearrange the ladybugs in the best position; 3) if 2) does not occur then the solution is “YES” only if all the ladybugs are already happy (because they cannot be moved) [Read More]