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

func main(){
    let abc = readInts()
    let(a,b,c) = (abc[0],abc[1],abc[2])
    
    let x = 4 * a * b
    let y = (c - a - b)*(c - a - b)
    if x < y && a + b < c {
        print("YES")
        return
    }
    print("NO")
}
    
main()

