#1120. AC. [4940910]. M: 548 KB. RT: 0.171 s. (Name: Sum of Sequential Numbers)
#1120. AC. [4940913]. M: 540 KB. RT: 0.171 s. (Name: Sum of Sequential Numbers)
#1753. AC. [4940927]. M: 564 KB. RT: 0.14 s. (Name: Bookshelf)