import scala.io.StdIn.readLong
import scala.math._

def sqrtLong(n: Long): Long =
    if (n == 0 || n == 1) return n
    var x0 = n / 2
    var x1 = (x0 + n / x0) / 2
    while (x1 < x0)
        x0 = x1
        x1 = (x0 + n / x0) / 2
    x0

@main
def yuki648(): Unit =
    val n = 2 * readLong
    val k = sqrtLong(n)
    if n == k * (k + 1) then
        println("YES")
        println(k)
    else
        println("NO")