program sqrt
    implicit none
    integer :: i, j, k

    read *, i, j, k

    if ((real(i**0.5) + real(j**0.5)) < real(k**0.5)) then
        print *, "Yes"
    else if ((real(i**0.5) + real(j**0.5)) > real(k**0.5)) then
        print *, "No"
    else if ((real(i**0.5) + real(j**0.5)) == real(k**0.5)) then

    end if

end program sqrt
