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.

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.

Constraints

• $1 \leq N \leq 10^6$

Sample Input 1

15

Sample Output 1

60

The first 15 terms of the FizzBuzz sequence are:
$1,2,\text{Fizz},4,\text{Buzz},\text{Fizz},7,8,\text{Fizz},\text{Buzz},11,\text{Fizz},13,14,\text{FizzBuzz}$
Among them, numbers are 1,2,4,7,8,11,13,14, and the sum of them is 60.

Sample Input 2

1000000

Sample Output 2

266666333332

Watch out for overflow.

见题面 Input 部分

见题面 Output 部分