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()
    val left = 4 * a * b
    val right = (c-a-b)*(c-a-b)
    if (c - a - b > 0 && left < right) {
        println("Yes")
    } else {
        println("No")
    }
}