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  1. /*
  2.  
  3. You need your max_rating, current_rating and last 3 rounds rating changes. 
  4.  
  5. Enter the numbers in this order:
  6.  
  7. max_rating
  8. current_rating 
  9. ratings_change1 
  10. ratings_change2 
  11. ratings_change3 
  12. lucky_number 
  13.  
  14.  
  15. Sit back and get your rating prediction for as long as you are not satisfied with it.
  16.  
  17. */
  18.  
  19.  
  20. #include<bits/stdc++.h>
  21. using namespace std;
  22. // #pragma GCC optimize "trapv"
  23.  
  24.  
  25. const int SEED_ACCEPTANCE_LT = 10;
  26. const int MULT_ACCEPTANCE_LT = 301;
  27. const int COUNT_PREV_CONTEST_DELTA = 3;
  28. const int MULTIPLIER = 10;
  29. const int UPP_LIM_FOR_MUL = 1000;
  30. const int MAX_RATING_SO_FAR = 3797;
  31. const int MY_FAV_REDUCING_AGENT = -3;
  32.  
  33. // 12
  34. string title_on_rating[] = { 
  35.     "Undated",
  36.     "Noobie", 
  37.     "Puppy-lil", "Spicy-list", "Eggs-puff",
  38.     "Candyman-Disaster", "Maatsaab", "Entertainment-Mstrbator", 
  39.     "Grandma's Sister", "Indigenous Gangbastad", "Legendary Grandma",
  40.     "Insanity"
  41. };
  42.  
  43. int ratings_list [] = {
  44.     1, 
  45.     1200, 1400, 1600, 
  46.     1900, 2100, 2300, 
  47.     2400, 2600, 3000, MAX_RATING_SO_FAR+1, 
  48.     10000
  49. };
  50.  
  51. class Rating {
  52. public:
  53.     int maxRating = 0, currRating = 0;
  54.     int predictedRating = 0;
  55.     int testCases = 1;
  56.     int curr_rank = 0;
  57.  
  58.     vector<int> prev_rating_deltas;
  59.  
  60.     Rating (int r1, int r2) {
  61.         maxRating = r1, currRating = r2;
  62.         predictedRating = r2;
  63.         curr_rank = (int)(upper_bound(ratings_list, ratings_list+12, currRating) - ratings_list);
  64.     }
  65.  
  66.     void Get_PastRatings() {
  67.         prev_rating_deltas.resize(COUNT_PREV_CONTEST_DELTA);
  68.         cout << "Enter the ratings delta of past " << COUNT_PREV_CONTEST_DELTA << " contests:\n";
  69.         bool rainboy_flag = false;
  70.         for (int i = 0; i < COUNT_PREV_CONTEST_DELTA; i++) {
  71.             cin >> prev_rating_deltas[i];
  72.             rainboy_flag |= (abs(prev_rating_deltas[i]) >= 111);
  73.         }
  74.         if (rainboy_flag) cout << "\"rainboy delta is detected\"\n";
  75.         sort(prev_rating_deltas.begin(), prev_rating_deltas.end());
  76.         if (prev_rating_deltas[0] > 0) {
  77.             prev_rating_deltas[0] = - prev_rating_deltas[0];
  78.         }
  79.         if (prev_rating_deltas[COUNT_PREV_CONTEST_DELTA-1] < 0) {
  80.             prev_rating_deltas[COUNT_PREV_CONTEST_DELTA-1] = - prev_rating_deltas[COUNT_PREV_CONTEST_DELTA-1];
  81.         }
  82.  
  83.     }
  84.  
  85.     void Set_TestCases() {
  86.         cout << "Enter your lucky number duh\n";
  87.         cin >> testCases;
  88.         testCases = (testCases % 9) + 1;
  89.         testCases *= MULTIPLIER;
  90.     }
  91.  
  92.     void Prediction_Process() {
  93.         vector<int> predicted_n_ratings(testCases);
  94.         vector<long long> seeds(2);
  95.         for (long long &seed: seeds) {
  96.             seed = rand() % SEED_ACCEPTANCE_LT + 1;
  97.         }
  98.         while (seeds[0] == seeds[1]) {
  99.             seeds[0] = rand() % SEED_ACCEPTANCE_LT + 1;
  100.         }
  101.         for (int tc = 0; tc < testCases; tc++) {
  102.  
  103.             int thisRating = 
  104.             (int)(
  105.                 (seeds[0] * currRating + seeds[1] * maxRating) 
  106.                     / 
  107.                 (seeds[0] + seeds[1])
  108.             );
  109.  
  110.             vector<long long> multipliers_for_prev_rounds(COUNT_PREV_CONTEST_DELTA);
  111.             for (long long &mult: multipliers_for_prev_rounds) {
  112.                 mult = rand() % UPP_LIM_FOR_MUL + 1;
  113.             }
  114.  
  115.             sort(multipliers_for_prev_rounds.begin(), multipliers_for_prev_rounds.end());
  116.             int medianPos = COUNT_PREV_CONTEST_DELTA / 2;
  117.             for (int cc = 0; cc < COUNT_PREV_CONTEST_DELTA; cc++) {
  118.                 while (llabs(multipliers_for_prev_rounds[cc] - multipliers_for_prev_rounds[medianPos]) > MULT_ACCEPTANCE_LT) {
  119.                     multipliers_for_prev_rounds[cc] = rand() % UPP_LIM_FOR_MUL + 1;
  120.                 }
  121.                 sort(multipliers_for_prev_rounds.begin(), multipliers_for_prev_rounds.end());
  122.             }
  123.  
  124.             long long resultantRatingDelta = 0ll, multSum = 0ll;
  125.             for (int position = 0; position < COUNT_PREV_CONTEST_DELTA; position++) {
  126.                 resultantRatingDelta += (multipliers_for_prev_rounds[position] * (long long) prev_rating_deltas[position]);
  127.                 multSum += multipliers_for_prev_rounds[position];
  128.             }
  129.             resultantRatingDelta /= multSum;
  130.             predicted_n_ratings[tc] = thisRating + (int)resultantRatingDelta;
  131.         }
  132.  
  133.         // nearest neighbour like
  134.         sort(predicted_n_ratings.begin(), predicted_n_ratings.end());
  135.         int median1 = testCases/2, median2 = testCases/2+1;
  136.         int group1_mean = predicted_n_ratings[median1], group2_mean = predicted_n_ratings[median2];
  137.         int group1_nos = 1, group2_nos = 1;
  138.         long long sophisticated_sum1 = 0ll, sophisticated_sum2 = 0ll;
  139.  
  140.         for (int i = 0; i < testCases; i++) {
  141.             if (abs(group1_mean - predicted_n_ratings[i]) < abs(group2_mean - predicted_n_ratings[i])) {
  142.                 if (abs(group1_mean - predicted_n_ratings[i]) < MULT_ACCEPTANCE_LT) {
  143.                     group1_mean = (int)((long long)group1_mean + predicted_n_ratings[i]) / 2;
  144.                     sophisticated_sum1 += predicted_n_ratings[i];
  145.                     group1_nos++;
  146.                 }
  147.             } else {
  148.                 if (abs(group2_mean - predicted_n_ratings[i]) < MULT_ACCEPTANCE_LT) {
  149.                     group2_mean = (int)((long long)group2_mean + predicted_n_ratings[i]) / 2;
  150.                     sophisticated_sum2 += predicted_n_ratings[i];
  151.                     group2_nos++;
  152.                 }
  153.             }
  154.         }
  155.         int KNN_like_mean = 
  156.         (int) (
  157.             ((long long)(group1_mean) * group1_nos + (long long) (group2_mean) * group2_nos) 
  158.                     /
  159.              (long long)(group2_nos + group1_nos)
  160.         );
  161.         int sophisticated_like_mean = 
  162.         (int) (((sophisticated_sum1 / group1_nos + sophisticated_sum2 / group2_nos)) / 2
  163.         );
  164.  
  165.         // cout << ".\n[KNN_like_mean: " << KNN_like_mean << "] & [sophisticated_like_mean: " << sophisticated_like_mean << "]\n";
  166.         if (sophisticated_like_mean > KNN_like_mean) {
  167.             swap(sophisticated_like_mean, KNN_like_mean);
  168.         }
  169.         sort(seeds.begin(), seeds.end());
  170.         int KEN_MULTIPLIER = (rand() % MULT_ACCEPTANCE_LT) + MULTIPLIER;
  171.         int XEN_MULTIPLIER = (rand() % KEN_MULTIPLIER) / 2 + 1;
  172.  
  173.         predictedRating = 
  174.         (int)(
  175.             ((XEN_MULTIPLIER * seeds[0] * sophisticated_like_mean) + (KEN_MULTIPLIER * seeds[1] * KNN_like_mean))
  176.                 /
  177.             (((XEN_MULTIPLIER * seeds[0])) + (KEN_MULTIPLIER * seeds[1]))
  178.         );
  179.     }
  180.  
  181.     void Analysis() {
  182.         cout 
  183.         << "Your are currently " 
  184.         << title_on_rating[curr_rank] 
  185.         << ".\nA little bit of push and you're gonna make it to next level.\n" 
  186.         << title_on_rating[curr_rank+1]
  187.         << " is not too far from you. WH!GL!\n";
  188.         // cout << curr_rank << ratings_list[curr_rank] << "\n";
  189.     }
  190.  
  191.     void Challenge() {
  192.         const int maxContestSoFar = 1539;
  193.         string url_to_problem = "https://c...content-available-to-author-only...s.com/problemset/problem/";
  194.         cout << "\nA random challenge for you is to solve the following problem\n";
  195.         cout << url_to_problem << rand() % maxContestSoFar + 1 << "/" << char('A' + (curr_rank + 1) / 2) << "\n";
  196.         cout << "(If this link is invalid, the number you entered was not lucky...)\n";
  197.  
  198.     }
  199. };
  200.  
  201. signed main() {
  202.     // random random everywhere.
  203.     srand(unsigned(time(0)));
  204.  
  205.     #ifdef LUCTIVUD
  206.       // const auto start_time = std::chrono::high_resolution_clock::now();
  207.       freopen("/home/luctivud/CPPractice/Zinput.txt", "r", stdin);
  208.       freopen("/home/luctivud/CPPractice/Zoutput.txt", "w", stdout);
  209.     #endif
  210.  
  211.     // enter currRating and maxRating
  212.     int maxR, currR;
  213.     cout << "Enter your *max rating* and *current rating* respectively\n";
  214.     cin >> maxR >> currR;
  215.  
  216.     // validation of Rating
  217.     if (maxR < currR) {
  218.         cout << "Your max rating is less than your current rating.. What have you done, dumbass??\n";
  219.         return 0;
  220.     } else if (maxR > MAX_RATING_SO_FAR) {
  221.         cout << "Unfortunately, No one is interested in your insane shit. :P\n";
  222.     }
  223.  
  224.     // create rating object
  225.     Rating userRating(maxR, currR);
  226.  
  227.     // get past ratings
  228.     userRating.Get_PastRatings();
  229.  
  230.     // predict Ratings:
  231.     userRating.Set_TestCases();
  232.     userRating.Prediction_Process();
  233.  
  234.     // output ratings;
  235.     cout << "\n.\n..\n...\n";
  236.     cout << "Your *predicted rating* after next few rounds is: " << userRating.predictedRating;// << "\n";
  237.     cout << "\n...\n..\n.\n";
  238.  
  239.     userRating.Analysis();
  240.     userRating.Challenge();
  241.  
  242.     return 0;
  243. }
Success #stdin #stdout 0.01s 5660KB
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Enter your *max rating* and *current rating* respectively
Enter the ratings delta of past 3 contests:
Enter your lucky number duh

.
..
...
Your *predicted rating* after next few rounds is: 1549
...
..
.
Your are currently Spicy-list.
A little bit of push and you're gonna make it to next level.
Eggs-puff is not too far from you. WH!GL!

A random challenge for you is to solve the following problem
https://c...content-available-to-author-only...s.com/problemset/problem/308/C
(If this link is invalid, the number you entered was not lucky...)
https://ideone.com/p8ocxQ
/hellow
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
secret

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