{
  "total": 143,
  "topics": [
    {
      "id": 1559,
      "title": "Submissions Enabled and Leaderboard Activated",
      "comment_count": 18,
      "views": 18630,
      "votes": null
    },
    {
      "id": 1426,
      "title": "Training Data Release",
      "comment_count": 21,
      "views": 25357,
      "votes": 6
    },
    {
      "id": 1389,
      "title": "Welcome",
      "comment_count": 2,
      "views": 4785,
      "votes": null
    },
    {
      "id": 1650,
      "title": "ItemId vs UserId",
      "comment_count": 15,
      "views": 3943,
      "votes": 0
    },
    {
      "id": 2335,
      "title": "Solution Posted",
      "comment_count": 2,
      "views": 5616,
      "votes": null
    },
    {
      "id": 4969,
      "title": "Evaluation program",
      "comment_count": 1,
      "views": 3971,
      "votes": null
    },
    {
      "id": 3158,
      "title": "How Precision Value Is Calculated?",
      "comment_count": 1,
      "views": 4357,
      "votes": null
    },
    {
      "id": 2784,
      "title": "Using KDD Cup 99 Dataset",
      "comment_count": 0,
      "views": 6077,
      "votes": 1
    },
    {
      "id": 2656,
      "title": "Where can we find this paper:The Tencent Dataset and KDD-Cup'12",
      "comment_count": 0,
      "views": 5225,
      "votes": 0
    },
    {
      "id": 1681,
      "title": "Use of dataset for research beyond KDD Cup",
      "comment_count": 5,
      "views": 10259,
      "votes": null
    },
    {
      "id": 1982,
      "title": "When the competition is over, can anybody tell that how to achieve a score larger than 0.42?",
      "comment_count": 6,
      "views": 7786,
      "votes": null
    },
    {
      "id": 2017,
      "title": "When will the results on the leader board become final?",
      "comment_count": 1,
      "views": 3540,
      "votes": null
    },
    {
      "id": 1985,
      "title": "A Clean Leaderboard?",
      "comment_count": 4,
      "views": 5810,
      "votes": null
    },
    {
      "id": 2004,
      "title": "How long will the submission system run?",
      "comment_count": 1,
      "views": 3211,
      "votes": null
    },
    {
      "id": 1989,
      "title": "Will the true dataset be released?",
      "comment_count": 1,
      "views": 3248,
      "votes": null
    },
    {
      "id": 1983,
      "title": "Cannot make a submission",
      "comment_count": 1,
      "views": 2862,
      "votes": null
    },
    {
      "id": 1981,
      "title": "I can't help to see the paper in the workshop.",
      "comment_count": 1,
      "views": 2940,
      "votes": null
    },
    {
      "id": 1980,
      "title": "Delete the Duplicated Teams",
      "comment_count": 1,
      "views": 2722,
      "votes": 1
    },
    {
      "id": 1973,
      "title": "Is it still able to submit on June 1?",
      "comment_count": 2,
      "views": 3210,
      "votes": 2
    },
    {
      "id": 1972,
      "title": "Final score - how to submit ?",
      "comment_count": 3,
      "views": 3866,
      "votes": null
    },
    {
      "id": 1960,
      "title": "About the entities in item.txt",
      "comment_count": 2,
      "views": 2716,
      "votes": null
    },
    {
      "id": 1965,
      "title": "Why the result file must have 1,340,127 rows?",
      "comment_count": 0,
      "views": 1685,
      "votes": 0
    },
    {
      "id": 1957,
      "title": "Duplicate user_id+item_id records having different results in rec_log_train",
      "comment_count": 1,
      "views": 2103,
      "votes": null
    },
    {
      "id": 1952,
      "title": "the server is breakdonw?",
      "comment_count": 6,
      "views": 6086,
      "votes": null
    },
    {
      "id": 1935,
      "title": "Multiple Accounts Frozen",
      "comment_count": 2,
      "views": 2940,
      "votes": 1
    },
    {
      "id": 1906,
      "title": "what will MAP be when a user refused all recommendation indeed?",
      "comment_count": 1,
      "views": 2279,
      "votes": null
    },
    {
      "id": 1919,
      "title": "Factorization Machines",
      "comment_count": 0,
      "views": 3493,
      "votes": 9
    },
    {
      "id": 1838,
      "title": "What tools do you use to analysis it? ",
      "comment_count": 5,
      "views": 5509,
      "votes": null
    },
    {
      "id": 1923,
      "title": "How to generate the validation set?",
      "comment_count": 5,
      "views": 4148,
      "votes": null
    },
    {
      "id": 1872,
      "title": "Will the rec_log_test.txt with the right value be released? ",
      "comment_count": 4,
      "views": 3797,
      "votes": null
    },
    {
      "id": 1907,
      "title": "The same id in user_profile.txt and item.txt means the same user?",
      "comment_count": 0,
      "views": 1597,
      "votes": 0
    },
    {
      "id": 1738,
      "title": "Error function in SGD",
      "comment_count": 8,
      "views": 8027,
      "votes": null
    },
    {
      "id": 1853,
      "title": "Keywords, Categories and Tags",
      "comment_count": 1,
      "views": 2458,
      "votes": null
    },
    {
      "id": 1868,
      "title": "HELP ",
      "comment_count": 0,
      "views": 1547,
      "votes": 0
    },
    {
      "id": 1846,
      "title": "UserId and ItemId",
      "comment_count": 1,
      "views": 2986,
      "votes": null
    },
    {
      "id": 1699,
      "title": "崩溃了",
      "comment_count": 2,
      "views": 4584,
      "votes": null
    },
    {
      "id": 1847,
      "title": "Is mahout of use in this track?",
      "comment_count": 2,
      "views": 3666,
      "votes": null
    },
    {
      "id": 1848,
      "title": "The thing that everyone in track1 wonders!",
      "comment_count": 1,
      "views": 3178,
      "votes": null
    },
    {
      "id": 1845,
      "title": "About calculating MAP@3 in the training dataset",
      "comment_count": 0,
      "views": 1670,
      "votes": 0
    },
    {
      "id": 1842,
      "title": "How can you deal with rec_log_test file?",
      "comment_count": 0,
      "views": 2338,
      "votes": 0
    },
    {
      "id": 1771,
      "title": "KDD CUP using GraphLab",
      "comment_count": 1,
      "views": 3234,
      "votes": 1
    },
    {
      "id": 1761,
      "title": "About Results and User Keyword",
      "comment_count": 1,
      "views": 2361,
      "votes": null
    },
    {
      "id": 1749,
      "title": "user-item pairs in test and training",
      "comment_count": 1,
      "views": 2397,
      "votes": null
    },
    {
      "id": 1705,
      "title": "Where these user_keywords come from?",
      "comment_count": 2,
      "views": 3063,
      "votes": null
    },
    {
      "id": 1481,
      "title": "about the item.txt",
      "comment_count": 6,
      "views": 5560,
      "votes": null
    },
    {
      "id": 1475,
      "title": "About the three keyword dimensions",
      "comment_count": 5,
      "views": 6213,
      "votes": null
    },
    {
      "id": 1713,
      "title": "Final Leaderboard",
      "comment_count": 1,
      "views": 2269,
      "votes": null
    },
    {
      "id": 1710,
      "title": "About submission",
      "comment_count": 0,
      "views": 1658,
      "votes": 0
    },
    {
      "id": 1709,
      "title": "I cannot submit my files",
      "comment_count": 0,
      "views": 1573,
      "votes": 0
    },
    {
      "id": 1585,
      "title": "What was the mechanisem for pair removing on test?",
      "comment_count": 7,
      "views": 6201,
      "votes": null
    },
    {
      "id": 1651,
      "title": "Appears to be a bug in the test data/sample submissions.",
      "comment_count": 3,
      "views": 3513,
      "votes": null
    },
    {
      "id": 1697,
      "title": "Multiple submissions from same person?",
      "comment_count": 2,
      "views": 3316,
      "votes": null
    },
    {
      "id": 1688,
      "title": "Why are the items accepted not in the sns list of users?",
      "comment_count": 2,
      "views": 2638,
      "votes": null
    },
    {
      "id": 1691,
      "title": "no rec_log_test file is provided",
      "comment_count": 1,
      "views": 2214,
      "votes": null
    },
    {
      "id": 1583,
      "title": "About the sub_small_header.csv file",
      "comment_count": 3,
      "views": 3436,
      "votes": null
    },
    {
      "id": 1689,
      "title": "Why is an item accepted and rejected many times?",
      "comment_count": 2,
      "views": 2857,
      "votes": null
    },
    {
      "id": 1653,
      "title": "How the evaluation metric incorporate ranking information",
      "comment_count": 8,
      "views": 6375,
      "votes": null
    },
    {
      "id": 1667,
      "title": "About the evaluation formula:Who can tell me which one is correct?",
      "comment_count": 1,
      "views": 2503,
      "votes": null
    },
    {
      "id": 1687,
      "title": "is it the submission 1,340,127 rows",
      "comment_count": 0,
      "views": 1770,
      "votes": 0
    },
    {
      "id": 1644,
      "title": "Evaluation: number of items recommended vs accepted",
      "comment_count": 6,
      "views": 4927,
      "votes": null
    },
    {
      "id": 1666,
      "title": "april fools day joke?",
      "comment_count": 1,
      "views": 2605,
      "votes": 1
    },
    {
      "id": 1668,
      "title": "why the task is confused so many people？",
      "comment_count": 3,
      "views": 4058,
      "votes": null
    },
    {
      "id": 1652,
      "title": "One more question about test dataset generation",
      "comment_count": 2,
      "views": 3262,
      "votes": null
    },
    {
      "id": 1658,
      "title": "Few Questions",
      "comment_count": 1,
      "views": 2419,
      "votes": null
    },
    {
      "id": 1534,
      "title": "The files are too large",
      "comment_count": 2,
      "views": 4193,
      "votes": null
    },
    {
      "id": 1659,
      "title": "meaning of numbers in tag_id/keyword/item_category/item_key",
      "comment_count": 0,
      "views": 1484,
      "votes": 0
    },
    {
      "id": 1610,
      "title": "What is the Maximum Achievable Score?",
      "comment_count": 4,
      "views": 4619,
      "votes": null
    },
    {
      "id": 1625,
      "title": "Come on let's get 0.6+!",
      "comment_count": 6,
      "views": 4828,
      "votes": null
    },
    {
      "id": 1604,
      "title": "Make clear the task",
      "comment_count": 6,
      "views": 5524,
      "votes": null
    },
    {
      "id": 1649,
      "title": "The relationship between user_action.txt and user_sns.txt",
      "comment_count": 2,
      "views": 2389,
      "votes": null
    },
    {
      "id": 1647,
      "title": "Please clarify what should be the denumerator when calculating AP@3 for a single user?",
      "comment_count": 1,
      "views": 2346,
      "votes": null
    },
    {
      "id": 1646,
      "title": "About the number of users in submission file",
      "comment_count": 0,
      "views": 1579,
      "votes": 0
    },
    {
      "id": 1574,
      "title": "about the evaluation ",
      "comment_count": 14,
      "views": 10983,
      "votes": null
    },
    {
      "id": 1642,
      "title": "Public leaderboard results: 0.00000",
      "comment_count": 7,
      "views": 5119,
      "votes": null
    },
    {
      "id": 1645,
      "title": "MAP@3 on validation set",
      "comment_count": 0,
      "views": 1725,
      "votes": 0
    },
    {
      "id": 1485,
      "title": "count regularities in rec_log_train.txt ?",
      "comment_count": 3,
      "views": 3733,
      "votes": null
    },
    {
      "id": 1641,
      "title": "Is there any zombie user in the training or test datasets",
      "comment_count": 0,
      "views": 1554,
      "votes": 0
    },
    {
      "id": 1637,
      "title": "Task Validation",
      "comment_count": 1,
      "views": 2164,
      "votes": null
    },
    {
      "id": 1632,
      "title": "I wonder if I comprehended the evaluation correctly?",
      "comment_count": 4,
      "views": 4059,
      "votes": null
    },
    {
      "id": 1616,
      "title": "Could the organizer supply a evaluation script?",
      "comment_count": 7,
      "views": 5659,
      "votes": null
    },
    {
      "id": 1634,
      "title": "Downloading the Data",
      "comment_count": 0,
      "views": 1642,
      "votes": 0
    },
    {
      "id": 1628,
      "title": "Are all keywords listed in either item.txt or user_key_words.txt",
      "comment_count": 2,
      "views": 2871,
      "votes": null
    },
    {
      "id": 1631,
      "title": "写论文和实际应用还是有差距的",
      "comment_count": 0,
      "views": 3638,
      "votes": 0
    },
    {
      "id": 1620,
      "title": "confused about submission file",
      "comment_count": 3,
      "views": 3086,
      "votes": null
    },
    {
      "id": 1624,
      "title": "0.6+, oh my god...",
      "comment_count": 1,
      "views": 2627,
      "votes": null
    },
    {
      "id": 1617,
      "title": "Track 1 - Clarification Questions",
      "comment_count": 3,
      "views": 3506,
      "votes": null
    },
    {
      "id": 1611,
      "title": "what is the AP of a user if he does not follow any recommended item?",
      "comment_count": 2,
      "views": 2422,
      "votes": null
    },
    {
      "id": 1587,
      "title": "what is the \"entries\" meaning in the leaderboard?",
      "comment_count": 1,
      "views": 1987,
      "votes": null
    },
    {
      "id": 1570,
      "title": "Are the keywords stemmed?",
      "comment_count": 2,
      "views": 3029,
      "votes": null
    },
    {
      "id": 1612,
      "title": "Torrent File for Track 1 Data",
      "comment_count": 0,
      "views": 1766,
      "votes": 1
    },
    {
      "id": 1584,
      "title": "final VS. public test set?",
      "comment_count": 5,
      "views": 4553,
      "votes": 1
    },
    {
      "id": 1586,
      "title": "Item-category",
      "comment_count": 3,
      "views": 3253,
      "votes": null
    },
    {
      "id": 1600,
      "title": "Confused about Submission Instructions and sub_small_header.csv",
      "comment_count": 1,
      "views": 2326,
      "votes": null
    },
    {
      "id": 1592,
      "title": "Alternative Download Link",
      "comment_count": 0,
      "views": 1523,
      "votes": 0
    },
    {
      "id": 1562,
      "title": "Do we get ranking information from training set?",
      "comment_count": 3,
      "views": 3238,
      "votes": null
    },
    {
      "id": 1582,
      "title": "Different submission instruction",
      "comment_count": 1,
      "views": 1971,
      "votes": null
    },
    {
      "id": 1571,
      "title": "Why some users in test set are not in sample submission sub_small_header.csv?",
      "comment_count": 5,
      "views": 4991,
      "votes": null
    },
    {
      "id": 1565,
      "title": "duplicate keywords with different weights for the same user",
      "comment_count": 2,
      "views": 3123,
      "votes": null
    },
    {
      "id": 1563,
      "title": "# of clicks of each user in test set >=3?",
      "comment_count": 2,
      "views": 2800,
      "votes": null
    },
    {
      "id": 1554,
      "title": "Maybe I know what we should to do ",
      "comment_count": 1,
      "views": 2297,
      "votes": null
    },
    {
      "id": 1555,
      "title": "what is the meaning of Unix-timestamp in two rel_log files?",
      "comment_count": 0,
      "views": 1781,
      "votes": 0
    },
    {
      "id": 1551,
      "title": "Test Data Release",
      "comment_count": 8,
      "views": 5771,
      "votes": null
    },
    {
      "id": 1550,
      "title": "Is the  'items set'  a subset of  'users set'？",
      "comment_count": 2,
      "views": 2903,
      "votes": null
    },
    {
      "id": 1543,
      "title": "about the weight of keywords in user_key_word.txt",
      "comment_count": 1,
      "views": 2263,
      "votes": null
    },
    {
      "id": 1547,
      "title": "where is the test dadaset?",
      "comment_count": 4,
      "views": 3158,
      "votes": null
    },
    {
      "id": 1532,
      "title": "some question about tags and keywords",
      "comment_count": 1,
      "views": 3069,
      "votes": null
    },
    {
      "id": 1533,
      "title": "recommendation in trainset",
      "comment_count": 6,
      "views": 5069,
      "votes": null
    },
    {
      "id": 1544,
      "title": "Is the test data available now?",
      "comment_count": 2,
      "views": 2537,
      "votes": null
    },
    {
      "id": 1445,
      "title": "Possible Official Validation Set?",
      "comment_count": 14,
      "views": 11262,
      "votes": null
    },
    {
      "id": 1529,
      "title": "Question about the Unix timestamp",
      "comment_count": 1,
      "views": 2340,
      "votes": null
    },
    {
      "id": 1527,
      "title": "item category & tagID ??",
      "comment_count": 2,
      "views": 2326,
      "votes": null
    },
    {
      "id": 1525,
      "title": "Dr. Kaifu LEE.UserID==Dr. Kaifu LEE.ItemID?",
      "comment_count": 3,
      "views": 3723,
      "votes": null
    },
    {
      "id": 1521,
      "title": "Difficulties understanding the problem.",
      "comment_count": 5,
      "views": 4028,
      "votes": null
    },
    {
      "id": 1460,
      "title": "About Baseline",
      "comment_count": 11,
      "views": 8154,
      "votes": 1
    },
    {
      "id": 1523,
      "title": "How to Assemble a team",
      "comment_count": 0,
      "views": 1461,
      "votes": 0
    },
    {
      "id": 1513,
      "title": "Keywords",
      "comment_count": 1,
      "views": 2539,
      "votes": null
    },
    {
      "id": 1480,
      "title": "weight=2.0 in user_key_words.txt",
      "comment_count": 14,
      "views": 11452,
      "votes": null
    },
    {
      "id": 1517,
      "title": "Duplicated recommendation",
      "comment_count": 1,
      "views": 2265,
      "votes": null
    },
    {
      "id": 1506,
      "title": "Space of tag-Ids and Item-Keyword",
      "comment_count": 2,
      "views": 2778,
      "votes": null
    },
    {
      "id": 1448,
      "title": "Simple Stats",
      "comment_count": 11,
      "views": 9365,
      "votes": null
    },
    {
      "id": 1457,
      "title": "user_sns.txt incomplete",
      "comment_count": 5,
      "views": 4996,
      "votes": null
    },
    {
      "id": 1451,
      "title": "User follow himself???",
      "comment_count": 7,
      "views": 6859,
      "votes": null
    },
    {
      "id": 1463,
      "title": "the weight of key word",
      "comment_count": 3,
      "views": 3628,
      "votes": null
    },
    {
      "id": 1507,
      "title": "About Item-Id and User-Id",
      "comment_count": 1,
      "views": 3230,
      "votes": null
    },
    {
      "id": 1499,
      "title": "Updating the dataset description",
      "comment_count": 1,
      "views": 2394,
      "votes": null
    },
    {
      "id": 1489,
      "title": "about the weight of keyword",
      "comment_count": 1,
      "views": 2504,
      "votes": null
    },
    {
      "id": 1455,
      "title": "About the target",
      "comment_count": 11,
      "views": 7699,
      "votes": null
    },
    {
      "id": 1488,
      "title": "how many members in each team?",
      "comment_count": 2,
      "views": 3060,
      "votes": null
    },
    {
      "id": 1486,
      "title": "Could someone recommend some good papers?Track 1",
      "comment_count": 0,
      "views": 1642,
      "votes": 0
    },
    {
      "id": 1483,
      "title": "Assumptions about user-keywords, item-keywords and tag-id. (Official Confirmation required) ",
      "comment_count": 1,
      "views": 2388,
      "votes": null
    },
    {
      "id": 1450,
      "title": "where is the file rec_log_test.txt?",
      "comment_count": 2,
      "views": 2701,
      "votes": null
    },
    {
      "id": 1440,
      "title": "Exact meaning of result -1?",
      "comment_count": 4,
      "views": 3737,
      "votes": null
    },
    {
      "id": 1439,
      "title": "Unknown semantics of gender attribute value 3",
      "comment_count": 4,
      "views": 4287,
      "votes": null
    },
    {
      "id": 1442,
      "title": "Timestamps",
      "comment_count": 3,
      "views": 2963,
      "votes": null
    },
    {
      "id": 1437,
      "title": "Item categories a.b.c.d Loops in hierarchy?",
      "comment_count": 4,
      "views": 4088,
      "votes": null
    },
    {
      "id": 1435,
      "title": "some ages are shown as \"0-0-\"",
      "comment_count": 2,
      "views": 3073,
      "votes": 0
    },
    {
      "id": 1398,
      "title": "任务一（中文翻译）：KDD Cup2012 数据挖掘竞赛主题一：预测围脖的推荐结果",
      "comment_count": 12,
      "views": 23192,
      "votes": 1
    },
    {
      "id": 1428,
      "title": "where is rec_log_test.txt?",
      "comment_count": 4,
      "views": 4358,
      "votes": null
    },
    {
      "id": 1406,
      "title": "User join date data in Track 1 problem",
      "comment_count": 1,
      "views": 3184,
      "votes": null
    },
    {
      "id": 1410,
      "title": "About Team Forming",
      "comment_count": 8,
      "views": 6787,
      "votes": null
    },
    {
      "id": 1424,
      "title": "Where is the data set???",
      "comment_count": 11,
      "views": 8577,
      "votes": null
    },
    {
      "id": 1415,
      "title": "where's the data file?",
      "comment_count": 10,
      "views": 7178,
      "votes": null
    },
    {
      "id": 1417,
      "title": "seems official site is sometimes slow..",
      "comment_count": 4,
      "views": 5665,
      "votes": null
    }
  ],
  "errors": []
}