#-swank
(unless (member :child-sbcl *features*)
  (quit
   :unix-status
   (process-exit-code
    (run-program *runtime-pathname*
                 `("--control-stack-size" "128MB"
                   "--noinform" "--disable-ldb" "--lose-on-corruption" "--end-runtime-options"
                   "--eval" "(push :child-sbcl *features*)"
                   "--script" ,(namestring *load-pathname*))
                 :output t :error t :input t))))
;; -*- coding: utf-8 -*-
(eval-when (:compile-toplevel :load-toplevel :execute)
  (sb-int:defconstant-eqx OPT
    #+swank '(optimize (speed 3) (safety 2))
    #-swank '(optimize (speed 3) (safety 0) (debug 0))
    #'equal)
  #+swank (ql:quickload '(:cl-debug-print :fiveam) :silent t)
  #-swank (set-dispatch-macro-character
           #\# #\> (lambda (s c p) (declare (ignore c p)) (read s nil nil t))))
#+swank (cl-syntax:use-syntax cl-debug-print:debug-print-syntax)
#-swank (disable-debugger) ; for CS Academy

;; BEGIN_INSERTED_CONTENTS
;; Should we do this with UNWIND-PROTECT?
(defmacro with-buffered-stdout (&body body)
  "Buffers all outputs to *STANDARD-OUTPUT* in BODY and flushes them to
*STANDARD-OUTPUT* after BODY has been done (without error). Note that only
BASE-CHAR is allowed."
  (let ((out (gensym)))
    `(let ((,out (make-string-output-stream :element-type 'base-char)))
       (let ((*standard-output* ,out))
         ,@body)
       (write-string (get-output-stream-string ,out)))))

(declaim (ftype (function * (values fixnum &optional)) read-fixnum))
(defun read-fixnum (&optional (in *standard-input*))
  (declare #.OPT)
  (macrolet ((%read-byte ()
               `(the (unsigned-byte 8)
                     #+swank (char-code (read-char in nil #\Nul))
                     #-swank (sb-impl::ansi-stream-read-byte in nil #.(char-code #\Nul) nil))))
    (let* ((minus nil)
           (result (loop (let ((byte (%read-byte)))
                           (cond ((<= 48 byte 57)
                                  (return (- byte 48)))
                                 ((zerop byte) ; #\Nul
                                  (error "Read EOF or #\Nul."))
                                 ((= byte #.(char-code #\-))
                                  (setf minus t)))))))
      (declare ((integer 0 #.most-positive-fixnum) result))
      (loop
        (let* ((byte (%read-byte)))
          (if (<= 48 byte 57)
              (setq result (+ (- byte 48)
                              (* 10 (the (integer 0 #.(floor most-positive-fixnum 10)) result))))
              (return (if minus (- result) result))))))))

;;;
;;; Arithmetic operations with dynamic modulus
;;;

(declaim ((unsigned-byte 32) *modulus*))
(defvar *modulus*)

(defun mod* (&rest args)
  (reduce (lambda (x y) (mod (* x y) *modulus*)) args))

(sb-c:define-source-transform mod* (&rest args)
  (if (null args)
      1
      (reduce (lambda (x y) `(mod (* ,x ,y) *modulus*)) args)))

(defun mod+ (&rest args)
  (reduce (lambda (x y) (mod (+ x y) *modulus*)) args))

(sb-c:define-source-transform mod+ (&rest args)
  (if (null args)
      0
      (reduce (lambda (x y) `(mod (+ ,x ,y) *modulus*)) args)))

(define-modify-macro incfmod (delta &optional (divisor '*modulus*))
  (lambda (x y divisor) (mod (+ x y) divisor)))

(define-modify-macro decfmod (delta &optional (divisor '*modulus*))
  (lambda (x y divisor) (mod (- x y) divisor)))

(define-modify-macro mulfmod (delta &optional (divisor '*modulus*))
  (lambda (x y divisor) (mod (* x y) divisor)))

(defmacro dbg (&rest forms)
  #+swank
  (if (= (length forms) 1)
      `(format *error-output* "~A => ~A~%" ',(car forms) ,(car forms))
      `(format *error-output* "~A => ~A~%" ',forms `(,,@forms)))
  #-swank (declare (ignore forms)))

(defmacro define-int-types (&rest bits)
  `(progn
     ,@(mapcar (lambda (b) `(deftype ,(intern (format nil "UINT~A" b)) () '(unsigned-byte ,b))) bits)
     ,@(mapcar (lambda (b) `(deftype ,(intern (format nil "INT~A" b)) () '(signed-byte ,b))) bits)))
(define-int-types 2 4 7 8 15 16 31 32 62 63 64)

(declaim (inline println))
(defun println (obj &optional (stream *standard-output*))
  (let ((*read-default-float-format* 'double-float))
    (prog1 (princ obj stream) (terpri stream))))

(defconstant +mod+ 1000000007)

;;;
;;; Body
;;;

(defun main ()
  (let* ((n (read))
         (*modulus* (read))
         (graph (make-array n :element-type 'list :initial-element nil))
         (dp (make-array n :element-type 'uint31 :initial-element 0))
         (result (make-array n :element-type 'uint31 :initial-element 0)))
    (declare ((simple-array list (*)) graph))
    (dotimes (i (- n 1))
      (let ((x (- (read-fixnum) 1))
            (y (- (read-fixnum) 1)))
        (push x (aref graph y))
        (push y (aref graph x))))
    (labels ((dfs (v parent)
               (declare (int32 v parent))
               (let ((value 1))
                 (declare (uint31 value))
                 (dolist (child (aref graph v))
                   (declare (uint31 child))
                   (unless (= child parent)
                     (mulfmod value (+ 1 (dfs child v)))))
                 (setf (aref dp v) value)))
             (dfs2 (v parent)
               (declare (int32 v parent))
               (let* ((childs (remove parent (aref graph v)))
                      (len (length childs))
                      (cumul+ (make-array (+ len 1)
                                          :element-type 'uint31
                                          :initial-element 1))
                      (cumul- (make-array (+ len 1)
                                          :element-type 'uint31
                                          :initial-element 1)))
                 (loop for child in childs
                       for i below len
                       do (setf (aref cumul+ (+ i 1))
                                (mod* (aref cumul+ i)
                                      (+ 1 (aref dp child)))))
                 (loop for child in (reverse childs)
                       for i from len downto 1
                       do (setf (aref cumul- (- i 1))
                                (mod* (aref cumul- i)
                                      (+ 1 (aref dp child)))))
                 (setf (aref result v)
                       (mod* (+ 1 (if (= parent -1) 0 (aref dp parent)))
                             (aref cumul+ len)))
                 (loop for child of-type uint31 in childs
                       for i below len
                       do (setf (aref dp v)
                                (mod* (+ 1 (if (= parent -1) 0 (aref dp parent)))
                                      (aref cumul+ i)
                                      (aref cumul- (+ i 1))))
                          (dfs2 child v)))))
      (dfs 0 -1)
      (dfs2 0 -1))
    (with-buffered-stdout
      (map () #'println result))))

#-swank (main)

;;;
;;; Test and benchmark
;;;

#+swank
(defun io-equal (in-string out-string &key (function #'main) (test #'equal))
  "Passes IN-STRING to *STANDARD-INPUT*, executes FUNCTION, and returns true if
the string output to *STANDARD-OUTPUT* is equal to OUT-STRING."
  (labels ((ensure-last-lf (s)
             (if (eql (uiop:last-char s) #\Linefeed)
                 s
                 (uiop:strcat s uiop:+lf+))))
    (funcall test
             (ensure-last-lf out-string)
             (with-output-to-string (out)
               (let ((*standard-output* out))
                 (with-input-from-string (*standard-input* (ensure-last-lf in-string))
                   (funcall function)))))))

#+swank
(defun get-clipbrd ()
  (with-output-to-string (out)
    (run-program "C:/msys64/usr/bin/cat.exe" '("/dev/clipboard") :output out)))

#+swank (defparameter *this-pathname* (uiop:current-lisp-file-pathname))
#+swank (defparameter *dat-pathname* (uiop:merge-pathnames* "test.dat" *this-pathname*))

#+swank
(defun run (&optional thing (out *standard-output*))
  "THING := null | string | symbol | pathname

null: run #'MAIN using the text on clipboard as input.
string: run #'MAIN using the string as input.
symbol: alias of FIVEAM:RUN!.
pathname: run #'MAIN using the text file as input."
  (let ((*standard-output* out))
    (etypecase thing
      (null
       (with-input-from-string (*standard-input* (delete #\Return (get-clipbrd)))
         (main)))
      (string
       (with-input-from-string (*standard-input* (delete #\Return thing))
         (main)))
      (symbol (5am:run! thing))
      (pathname
       (with-open-file (*standard-input* thing)
         (main))))))

#+swank
(defun gen-dat ()
  (uiop:with-output-file (out *dat-pathname* :if-exists :supersede)
    (format out "")))

#+swank
(defun bench (&optional (out (make-broadcast-stream)))
  (time (run *dat-pathname* out)))

;; To run: (5am:run! :sample)
#+swank
(it.bese.fiveam:test :sample
  (it.bese.fiveam:is
   (common-lisp-user::io-equal "3 100
1 2
2 3
"
    "3
4
3
"))
  (it.bese.fiveam:is
   (common-lisp-user::io-equal "4 100
1 2
1 3
1 4
"
    "8
5
5
5
"))
  (it.bese.fiveam:is
   (common-lisp-user::io-equal "1 100
"
    "1
"))
  (it.bese.fiveam:is
   (common-lisp-user::io-equal "10 2
8 5
10 8
6 5
1 5
4 8
2 10
3 6
9 2
1 7
"
    "0
0
1
1
1
0
1
0
1
1
")))


Measured memory_bytes: 55352