Sum of the First N Squares
Add up the squares of the numbers 1 to N.
Input format
One line with an integer N (1 to 1000).
Output format
Print 11 + 22 + ... + N*N.
Constraints
- Values fit in a 64-bit signed integer
- Trailing whitespace and a trailing newline are ignored by the judge
Read from stdin, write to stdout. Sample cases below show the exact format.
Sample cases
Example 1
Input
3Expected output
14Example 2
Input
5Expected output
55