Problem Statement

Let us define the FizzBuzz sequence $a_1,a_2,...$ as follows:

• If both $3$ and $5$ divides $i$, $a_i=\text{FizzBuzz}$.
• If the above does not hold but $3$ divides $i$, $a_i=\text{Fizz}$.
• If none of the above holds but $5$ divides $i$, $a_i=\text{Buzz}$.
• If none of the above holds, $a_i=i$.

Find the sum of all numbers among the first $N$ terms of the FizzBuzz sequence.

Constraints

• $1 \leq N \leq 10^6$

Input

Input is given from Standard Input in the following format:

N

Output

Print the sum of all numbers among the first $N$ terms of the FizzBuzz sequence.