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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
3133 Here We Go(relians) Again   3 168 40.22
12
12
3166 Permutation Exponentiation   33 14.85
3184 Game of Lines   8 1299 27.73
14
9
3195 Doors and Penguins   9 236 27.76
19
16
3261 Race Against Time   37 1037 23.76
21
21
3305 Roman Patrollers   45 59.26
3306 Very Special Boxes   1 108 31.31
17
17
3314 Umnozak   102 29.03
42
17
3347 Cestarine   59 34.58
3374 Scavenger Hunt   10 1362 50.31
9
10
3375 Stamps   28 13680 41.74
5
3
3376 Parking Lot   1 138 20.05
17
17
3385 Yoda Goes Palindromic !   3 581 30.45
17
17
3393 Knot or Not   6 13.56
3394 Lagrange’s Four-Square Theorem   4 527 45.84
1
9
3412 Higgs Boson   48 18.93
3436 Histogram   43 1487 44.57
19
22
3442 The last digit   188 29221 26.95
9
8
3464 Clock   3 47 35.23
34
9
3466 Another Longest Common Subsequence Problem   6 42.86
3543 Matrica   52 39.06
3544 Binary Search Tree   6 584 20.58
11
20
3545 Najkraci   6 177 28.96
28
34
3591 Patting Heads   3 636 35.07
17
17
3605 Minimum Rotations   14 904 19.01
14
20
3640 Hanoi Subway System Construction   32 41.75
3723 Snooker   4 442 50.00
12
30
3734 Periodni   2 509 34.76
26
34
3749 Subset Sums   73 3998 26.28
17
20
3752 JEDNAKOST   12 595 18.40
23
21
3753 GONDOR   4 378 52.82
13
13
3754 MAJMUN   1 72 44.29
17
17
3763 George   15 520 52.57
19
18
3791 Street   7 662 51.56
9
12
3877 Cvjetici   17 972 48.61
12
21
3882 Cijevi   5 257 37.59
30
14
3898 Even Palindrome   -1 247 10.25
3931 Maximum Triangle Area   2 279 29.16
5
28
3946 K-th Number   237 5068 34.37
25
27
3953 Paid Roads   8 249 26.75
19
26
3961 Journey with Pigs   129 43.57
3962 ELEVATOR II   2 99 42.96
9
26
3975 Most Servings Meal   8 349 26.33
28
28
3977 Police Query   8 291 17.08
27
30
4010 Chặt cây   7 42.86
4070 Two Professors   101 14.47
4103 Extend to Palindrome   40 2321 29.55
16
17
4110 Fast Maximum Flow   47 2795 34.37
25
22
4157 Domino   4 54 50.42
42
42
4164 A conjecture of Paul Erdős   23 2008 45.08
16
14

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