import java.util.Scanner
import kotlin.system.exitProcess

fun main(args: Array<String>) {
	val scn = Scanner(System.`in`)
	val a = scn.nextLong()
	val b = scn.nextLong()
	val c = scn.nextLong()
	if (a+b>=c) no()
	val dC = c*c
	val dAB = (a+b)*(a+b)
	println(
			if (4*a*b+2*c*(a+b)<dC+dAB) "Yes" else "No"
	)
}

fun no(){
	println("No")
	exitProcess(0)
}