Byte and Chess#8659
While rushing to class, Baytik noticed a chessboard in the game room. He began to wonder how many different squares of side length (1 \leq k \leq n) can fit on a chessboard of size .
A natural number (n \leq 10000), representing the size of the chessboard.
A single number indicating the total number of different squares that can be placed on the chessboard.
Example 1