AtCoder AtCoder Beginner Contest ABC049 C - 白昼夢 ABC081 A - Placing Marbles B - Shift only ABC083 B - Some Sums ABC085 B - Kagami Mochi C - Otoshidama ABC086 A - Product C - Traveling ABC087 B - Coins ABC088 B - Card Game for Two ABC366 A - Election 2 B - Vertical Writing C - Balls and Bag Query 競プロ典型90問 001 - Yokan Party 002 - Encyclopedia of Parentheses 003 - Longest Circular Road 004 - Cross Sum