// 🐋💭

import Foundation

func readInts() -> [Int]{
    return readLine()!.split(separator: " ").map { Int($0)! }
}
func readInt() -> Int {
    return Int(readLine()!)!
}
func readSqrts() -> [Double] {
    return readLine()!.split(separator: " ").map { sqrt(Double($0)!) }
}

func main() {
    let abc = readSqrts()
    let (a, b, c) = (abc[0], abc[1], abc[2])
    print(a + b < c ? "Yes": "No")
}

main()

