import java.util.*

fun main(args: Array<String>) {
    val sc = Scanner(System.`in`)
    val a = sc.nextLong()
    val b = sc.nextLong()
    val c = sc.nextLong()

    println(pana2020c(a, b, c))
}

private fun pana2020c(a: Long, b: Long, c: Long): String {
  val cab = c - (a + b)
  val ab = a * b

  if (cab * cab > 4 * ab) return "Yes"

  return "No"
}