Sum of squares of numbers from 1 to N

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Task «Sum of squares of numbers from 1 to N»

Write a program that reads a positive integer N and outputs the sum of squares of all integers from 1 to N inclusive. Use a for loop to calculate the sum. It is guaranteed that N does not exceed 1000.

Input Format

One integer N (1 ≤ N ≤ 1000).

Output Format

One integer — the sum of squares of numbers from 1 to N.

Examples

Example 1

INPUT

1

OUTPUT

1

Example 2

INPUT

10

OUTPUT

385

Example 3

INPUT

Война и мир
Лев Толстой
1869

OUTPUT

Title: Война и мир, Author: Лев Толстой, Year: 1869

Example 4

INPUT

1
5

OUTPUT

1

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