Imports System.Collections.Generic
Imports System.Console

Module Program
    Sub Main()
        Dim a As Integer = NextInt()
        Dim b As Integer = NextInt()

        Dim ab As Integer = Concatenate(a, b)
        Dim sqrt As Integer = CInt(Math.Sqrt(ab))

        WriteLine(New String() {"No", "Yes"}(B2I(sqrt ^ 2 = ab)))
    End Sub

    Function Concatenate(a As Integer, b As Integer) As Integer
        Return CInt(CStr(a) & CStr(b))
    End Function

    Function NextInt() As Integer
        Return CInt(NextString())
    End Function

    Function B2I(ok As Boolean) As Integer
        If ok Then Return 1
        Return 0
    End Function

    Function NextString() As String
        Dim result As New List(Of Char)
        Do
            Dim tmp As Integer = Read()
            If tmp < 0 Then Exit Do
            Dim nextChar As Char = Chr(tmp)

            If Not Char.IsWhiteSpace(nextChar) Then
                result.Add(nextChar)
            ElseIf nextChar <> vbCr Then
                Exit Do
            End If
        Loop
        Return New String(result.ToArray())
    End Function

End Module
