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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
99 Bus   188 22.24
34
17
140 The Loner   160 21.49
34
17
145 Aliens   2 436 30.02
34
42
149 Fencing in the Sheep   3 102 12.99
34
17
202 Rockets   -1 60 12.32
34
34
208 Store-keeper   2 135 15.52
34
26
215 Panic in the Plazas   89 20.84
34
34
226 Jewelry and Fashion   1 20 26.36
34
50
262 Connections   1 114 28.93
34
34
278 Bicycle   62 13.55
34
1
309 The Room Pattern   1 48 14.99
34
17
369 Math I   89 25.23
34
34
385 Game schedule required   156 29.07
34
1
389 Use of Hospital Facilities   1 53 15.47
34
26
398 Roll Playing Games   121 14.67
34
17
414 Equatorial Bonfire   1 79 28.90
34
17
484 Fossil in the Ice   453 22.40
34
17
598 Increasing Subsequences   148 34.62
34
34
684 Another Assignment Problem   1 107 12.48
34
1
733 Mountain Walking   1 765 25.67
34
26
780 The Archipelago   40 41.41
34
26
861 Counting inversions   7 465 19.98
34
29
872 Mark-up   126 30.18
34
9
912 Submatrix of submatrix   1 174 27.01
34
17
944 Free Tour   19 3.72
34
17
1110 Sudoku   4 541 40.15
34
1
1267 Origin of Life   41 25.10
34
1
1269 CN Tower (Hard)   27 11.58
34
34
1454 Memory Distribution   27 18.00
34
17
1455 Program Analyser   29 14.57
34
17
1457 Help Blue Mary Please! (Act I)   13 1.74
34
17
1460 A Simple Calculator in the Galaxy   35 37.96
34
1468 Outside it is now raining   32 23.33
34
17
1505 Whac-a-Mole   2 44 15.97
34
9
1644 Trees   1 39 14.03
34
34
1678 Royal Treasury   -1 74 11.36
34
1
1687 Logic II   1 36 17.65
34
34
1797 Cardsharper   2 7 22.06
34
45
1869 Making Mountains Out Of Molehills   1 17 17.05
34
17
1873 Accumulate Cargo   2 91 26.79
34
9
1875 Cool Numbers   7 169 30.30
34
34
1878 Farmers Cattle   1 57 36.89
34
34
1879 Game Time   1 101 22.17
34
34
1960 Rectangles   4 173 16.61
34
28
1991 Another Continuous Fractions Problem   1 84 19.97
34
17
2147 Root of a Linear Equation   66 8.90
34
17
2152 Hilbert Curve   1 13 16.29
34
34
2172 Ballroom Lights   1 35 32.94
34
17
2176 Finding Seats   2 224 15.00
34
34
2189 Making Pairs   1 48 16.54
34
42

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