diff --git a/hws/03_amazon_prime/README.md b/hws/03_amazon_prime/README.md
index c2bc386..f6fd495 100644
--- a/hws/03_amazon_prime/README.md
+++ b/hws/03_amazon_prime/README.md
@@ -22,8 +22,35 @@ In this assignment, you will be completing a program which aims to implement the
 
 ## Specification
 
+In this assignment we assume there are 500 users in total, and we index these users from 0 to 499.
+
+We assume there are 110 movies in total, indexed from 0 to 109.
+
+We assume there are 100 tv shows in total, indexed from 0 to 99.
+
+All the movies and shows are hardcoded in the [main.cpp](main.cpp).
+
 ## Input Files
 
+Two input files are provided: [movieRatings.txt](movieRatings.txt) and [showRatings.txt](showRatings.txt). The two files have the same format. For example, the following is the first few lines of the [movieRatings.txt](movieRatings.txt]:
+
+```console
+(87,3) (11,1) (14,1) (31,4) (101,4) (21,2) (23,1) (3,4) (38,5) (100,2) (109,1) (80,4) (15,3) (71,5) (52,5) (67,2) (78,2) (69,3) (72,2) (93,4) (35,3) (102,4) (81,4) (107,4) (79,4) (58,1) (105,5) (90,2) (6,3) (9,3) (53,4) (59,2) (62,2) (94,2) (54,2) (85,3) (57,5) (5,4) (32,4) (39,2) (42,2) 
+(6,1) (61,2) (109,2) (87,4) (28,4) (38,5) (22,4) (11,2) (59,4) (68,3) (33,5) (71,3) (72,4) (15,4) (49,3) (94,1) (55,1) 
+(76,3) (33,1) (78,4) (65,4) (62,4) (73,5) (1,4) (105,2) (34,4) (18,4) (75,4) (99,4) (94,1) (83,3) (14,5) (85,2) (26,4) (15,4) (21,4) (69,1) (10,4) (81,1) (22,3) (61,2) (7,2) (25,2) (43,4) (70,2) (6,5) (0,2) (38,4) (95,5) (107,4) (72,4) (49,2) (90,2) (2,4) (88,3) (104,2) (23,3) (97,5) (56,4) (58,4) (57,5) (100,1) (37,4) (80,4) (96,4) (42,4) (77,5) (3,1) (46,1) (29,3) (19,5) (103,5) 
+(26,4) (57,4) (84,5) (60,4) (70,2) (99,3) (87,5) (94,1) (81,4) (16,2) (67,2) (36,2) (103,4) (28,1) (97,4) (73,5) (45,1) (37,4) (13,2) (17,4) (11,5) (66,2) (10,4) (85,1) (51,5) (96,4) (4,4) (21,5) (9,2) (74,5) (50,3) (104,3) (15,2) (35,5) (101,1) (102,4) (77,5) (62,1) (34,4) (71,5) (20,5) (46,1) (44,1) (90,1) (49,1) (2,4) (80,3) (95,1) (24,5) (98,3) (8,3) (14,3) (47,1) (32,3) (29,1) (18,4) (63,4) (40,3) (59,2) (69,5) (100,1) (107,3) (55,4) (0,4) 
+(69,4) (63,2) (32,5) (31,4) (74,2) (46,1) (99,4) (26,4) (90,4) (89,1) (58,1) (27,5) (29,2) (7,4) (65,3) (60,5) (23,1) (97,4) (53,4) (39,5) (87,5) (47,3) (8,4) (15,1) (102,3) (35,4) (106,4) (73,5) (98,4) (42,4) (66,5) (76,1) (104,2) (94,1) (77,1) (56,4) (109,4) (54,4) (103,2) (71,2) (25,4) (92,5) (24,4) (52,4) (34,4) (14,3) (55,2) (22,4) (80,2) (44,2) (4,4) (75,3) (13,4) (91,4) (61,3) (82,1) (84,3) (28,2) (51,3) (30,4) (85,5) (62,4) (86,4) (70,4) (43,5) (33,4) (107,2) (64,5) (108,4) (9,3) (88,3) (11,1) 
+(10,4) (38,1) (0,4) (20,1) (41,3) (94,1) (64,5) (71,1) (22,4) (34,3) (96,1) (46,3) (50,5) (39,2) (109,4) (82,1) (65,5) (2,3) (37,4) (44,3) (69,1) (105,4) (30,4) (29,3) 
+(11,4) (98,2) (76,2) (50,2) (35,3) (16,1) (18,5) (70,4) (30,5) (3,2) (90,2) (36,1) (83,4) (102,2) (105,4) (49,4) (94,1) (85,2) (20,3) (107,1) (28,1) (48,2) (12,2) (15,4) 
+(67,3) (27,4) (58,2) (6,3) (42,5) (63,3) (0,5) (49,4) (53,4) (66,3) (17,2) (41,2) (90,1) (84,4) (83,4) (46,1) (22,4) (13,2) (15,1) (75,1) (11,4) (62,4) (102,4) (35,1) (5,5) (69,4) (81,3) (93,4) (44,1) (59,5) (31,4) (8,3) (47,5) (106,3) (7,1) (61,3) (51,3) (99,1) (54,1) (32,3) (78,4) (72,3) (24,1) (48,4) (40,4) (97,4) (74,2) (33,1) (26,3) (68,5) (95,4) (64,4) (4,3) (25,4) (103,3) (52,5) (65,5) (30,4) (28,2) (39,4) (18,2) (73,1) (105,3) (45,4) (38,2) (23,4) (16,2) (21,4) (2,4) (9,5) (77,2) (82,2) (19,3) 
+(82,1) (83,4) (64,1) (98,3) (94,2) (4,1) (38,5) (90,5) (31,1) (2,5) (61,1) (102,3) (103,1) (45,4) (89,4) (1,2) (85,4) (63,2) (49,4) (77,4) (28,1) (91,4) (8,4) (53,5) (46,4) (23,4) (73,2) (104,5) (62,4) (66,4) (25,2) (44,4) (9,1) (30,1) (29,1) (108,1) (48,1) (52,4) (76,1) (92,4) (15,3) (101,4) (59,1) (32,4) (22,2) (33,3) (21,2) (35,4) (65,2) (109,1) (69,5) (27,4) 
+(101,4) (37,2) (24,1) (0,4) (63,2) (71,5) (64,3) (2,4) (65,1) (45,4) (7,4) (50,2) (81,2) (93,1) (42,5) (83,4) (29,2) (21,2) (51,5) (86,4) (82,1) (108,2) (23,4) (40,2) (89,4) (88,3) (78,5) (107,4) (9,3) (56,5) (60,5) (46,5) (44,4) (67,3) (18,3) (10,4) (103,1) (8,5) (34,3) (12,5) (96,5) (35,2) (68,3) (61,1) (58,1) (20,3) (100,4) (97,4) (47,5) (95,1) (92,4) (32,5) (27,5) (52,4) (25,4) (5,4) (85,4) (57,2) (30,3) (76,4) (72,5) (1,5)
+```
+
+Each line is representing one user. Each user uses the amazon star rating (as show in below image) to rate a movie or a tv show.  The first line [movieRatings.txt](movieRatings.txt) means, user 0 gives a rating of 3 to movie 83, gives a rating of 1 to movie 1, gives a rating of 1 to movie 14, gives a rating of 4 to moving 31, gives a rating of 4 to movie 101, gives a rating of 2 to movie 21, etc.
+
+![alt text](images/starRatings.png "Amazon Star Rating")
+
 ## Commands to Support
 
 ## Program Requirements & Submission Details