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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
3975 Most Servings Meal   8 353 26.30
28
28
3977 Police Query   8 299 17.34
27
30
3978 Distance Query   70 1835 32.93
24
21
3979 Whirligig number   8 1030 38.01
10
15
3980 Point Visible   1 49 32.22
34
50
3981 Shortest Regular Bracket   81 33.92
3982 String problem   7 604 48.91
9
23
3983 Right Triangle Counting   3 189 17.84
30
21
3999 FROGGER   3 101 27.47
28
23
4000 GALLUP   1 67 45.51
17
34
4003 Subway planning   43 18.98
4004 Exploding CPU   139 45.77
4008 Con Voi   9 57.69
4010 Chặt cây   10 33.33
4021 Bipalindrome   183 30.77
4031 Mass of Molecule   29 2604 48.14
12
9
4033 Phone List   151 7173 31.62
16
14
4034 Pizza Delivery   53 16.55
4035 NERED   2 394 57.72
9
13
4036 Cuckoo Hashing   3 150 27.22
17
6
4038 Counting The Way of Bracket Replacement   7 437 38.77
26
21
4052 Game   75 29.63
4053 Card Sorting   26 690 43.58
22
27
4060 A game with probability   208 22.14
4061 Polygon   4 214 31.29
21
17
4062 Rob Mini-Safe   112 39.35
4063 Sell Pigs   2 459 51.26
26
42
4069 Morphing is Fun   29 19.67
4070 Two Professors   103 14.30
4082 BLAST   30 1751 51.65
8
16
4083 Tele Broadcast   67 50.52
4097 Locomotive   35 38.30
4100 Sum of Vectors   -1 101 30.32
50
34
4103 Extend to Palindrome   44 2509 30.12
16
17
4110 Fast Maximum Flow   48 2961 34.26
25
22
4141 Euler Totient Function   147 11862 38.82
8
11
4142 Ellipse   17 8.37
4154 IZBORI   36 24.54
4155 OTOCI   2 497 45.57
26
34
4156 PLAHTE   66 35.86
4157 Domino   4 53 47.24
42
42
4160 A1 Road   88 50.21
4164 A conjecture of Paul Erdős   24 2520 43.78
16
15
4166 Four colors   2 102 21.84
42
42
4168 Square-free integers   14 738 45.45
16
21
4172 Multiplicative digital root   1 73 24.23
4176 A Knightly Pursuit   2 65 28.25
26
17
4177 Herding   57 2716 35.24
14
15
4178 Distance on a square lattice   121 53.06
4179 Temptation Island   2 651 44.96
20
12

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