Solve Later Again

Append a 'Solve Later Again' table on AtCoder Problems. Add a 'Solve Later Again' table to the AtCoder Problems Table page so you can manage problems you want to solve again. A checkbox is added next to each problem. Check the boxes for problems you want to solve again later to add them to the Solve Later Again table. Problems you have solved once are highlighted after 7 days (30 days), so you can try them again.