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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
4008 Con Voi   9 57.69
4010 Chặt cây   11 22.58
4021 Bipalindrome   183 30.77
4031 Mass of Molecule   29 2611 48.18
12
9
4033 Phone List   151 7335 31.82
16
14
4034 Pizza Delivery   53 16.51
4035 NERED   2 395 57.76
9
13
4036 Cuckoo Hashing   3 152 27.39
17
6
4038 Counting The Way of Bracket Replacement   7 442 38.74
26
21
4052 Game   75 29.27
4053 Card Sorting   26 696 43.66
22
27
4060 A game with probability   210 22.15
4061 Polygon   4 215 31.41
21
17
4062 Rob Mini-Safe   114 39.46
4063 Sell Pigs   2 481 52.19
26
42
4069 Morphing is Fun   29 16.07
4070 Two Professors   104 14.10
4082 BLAST   30 1761 51.74
9
16
4083 Tele Broadcast   67 50.26
4097 Locomotive   35 37.89
4100 Sum of Vectors   -1 103 29.60
50
34
4103 Extend to Palindrome   44 2590 30.58
16
17
4110 Fast Maximum Flow   48 3061 34.31
25
22
4141 Euler Totient Function   147 12037 39.03
8
11
4142 Ellipse   21 9.46
4154 IZBORI   42 26.67
4155 OTOCI   2 512 45.42
26
34
4156 PLAHTE   69 35.77
4157 Domino   4 56 49.80
42
42
4160 A1 Road   89 50.90
4164 A conjecture of Paul Erdős   25 2692 43.78
16
14
4166 Four colors   2 104 22.01
42
42
4168 Square-free integers   14 788 46.27
16
21
4172 Multiplicative digital root   1 77 24.16
4176 A Knightly Pursuit   2 67 29.28
26
17
4177 Herding   57 2731 35.22
14
15
4179 Temptation Island   2 655 45.09
20
12
4180 Pizza Location   2 577 18.60
31
17
4181 MELE3   19 617 42.70
20
21
4182 Candy (Again)   2 236 18.78
34
34
4185 Cube   57 35.57
4186 Break a New RSA system   1 138 34.12
4188 Amazing equality   43 14.08
4189 Landing   1 8 4.08
50
50
4191 Sky Code   13 778 29.59
19
26
4194 Another Lucky Numbers   4 142 33.44
17
13
4195 GCD Determinant   1 273 45.30
1
34
4197 Dominoes   4 125 23.08
23
23
4198 Lego   5 195 25.35
24
22
4200 Hamster flight   13 1160 45.54
5
13

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