Problem:
Score : 200 points

Problem Statement

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

If both 3 and 5 divides i, a_i=\mbox{FizzBuzz}.

If the above does not hold but 3 divides i, a_i=\mbox{Fizz}.

If none of the above holds but 5 divides i, a_i=\mbox{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.

Sample Input 1

15

Sample Output 1

60

The first 15 terms of the FizzBuzz sequence are:

1,2,\mbox{Fizz},4,\mbox{Buzz},\mbox{Fizz},7,8,\mbox{Fizz},\mbox{Buzz},11,\mbox{Fizz},13,14,\mbox{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.

Solution in Kotlin (1.3.71) (judge verdict: Accepted)

fun readInt(): Int {
    val N: Int = readLine()!!.toInt()
    return N
}

fun readString(): String {
    val N: String = readLine()!!
    return N
}

fun solveB(): Long{
    val N: Int = readLine()!!.toInt()
    var An: Array<Int?> = arrayOfNulls(N)
    var ans: Long = 0
    for (i in An.indices) {
        val num: Int = (i + 1)
        if (num%3 == 0 || num%5 == 0 ){
            continue
        }
        ans += num
    }
    return ans
}

fun main() {
    // 20200421 A problem
    /*
    if (readString().contains('7')){
        println("Yes")
    } else {
        println("No")
    }
    */
    println(solveB())
}