OnlineObservation Award 2018

Featured Problems of 2018
Throwback on the problems this year selected by OnlineObservation! Popular problems in the Instagram will also be awarded here! To further increase the value of the problems. We appreciate having lots of wonderful problems and moments covered in this year. Everything is memorable without forgetting.

OnlineObservationが選ぶ今年の課題を振り返る!インスタグラムで人気の課題もここで表彰します! 課題の価値をより高めるために。この1年でたくさんの素晴らしい課題と瞬間を記録できたことに感謝。全てが忘れらない思い出になっています。