list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
33 Trip   18 1931 25.93
25
16
39 Piggy-Bank   139 8059 35.44
14
16
63 Square Brackets   92 3834 56.91
14
18
64 Permutations   98 4264 51.96
12
20
66 Cross-country   38 4052 64.55
11
12
97 Party Schedule   250 8787 36.10
14
16
108 Decoding Morse Sequences   7 788 24.26
24
17
130 Rent your airplane and make money   88 3335 28.63
18
17
137 Partition   17 780 36.68
17
20
151 The Courier   37 1030 35.84
22
23
154 Sweet and Sour Rock   79 3399 51.42
14
17
181 Scuba diver   98 3780 25.93
18
18
207 Three-coloring of binary trees   16 873 35.92
20
17
237 Sums in a Triangle   -13 3566 42.38
28
10
277 City Game   16 1271 38.80
20
21
345 Mixtures   254 8705 36.47
17
21
346 Bytelandian gold coins   541 25529 25.11
11
12
365 Phidias   25 1211 47.22
13
21
388 Menu   7 347 18.89
25
16
394 Alphacode   574 21929 27.19
15
15
423 Assignments   242 4604 33.54
18
21
428 Particular Palindromes   5 492 32.02
22
24
676 Sorting is not easy   9 535 39.62
19
32
703 Mobile Service   6 881 21.22
24
28
740 Treats for the Cows   260 8461 42.60
13
14
757 Thermal Luminescence   121 39.26
1021 Aibohphobia   306 10569 36.17
12
17
1027 Fool the Police   25 1636 26.97
18
23
1031 Up Subsequence   2 725 32.52
17
12
1329 Matrix   6 409 17.21
28
26
1391 Summing to a Square Prime   16 1415 54.06
12
17
1459 The Secret of an Aerolite   8 259 43.46
24
26
1475 Play with Digit Seven   3 121 36.53
34
14
1702 Cleaning Robot   45 1527 34.32
28
20
1703 ACM (ACronymMaker)   52 1070 29.78
26
21
1710 Two Ends   115 3753 42.27
18
17
1847 No Change   37 1671 36.23
11
14
1871 Making A Budget   15 865 48.45
13
15
2007 Another Very Easy Problem! WOW!!!   17 758 39.00
13
28
2127 Rain   3 432 40.34
17
14
2176 Finding Seats   2 220 14.87
34
34
2416 Distinct Subsequences   94 3686 36.20
12
22
2530 Tiling a Grid With Dominoes   57 2383 65.01
15
23
2815 Increasing Subsequences   52 2143 28.18
14
22
2816 Common Subsequences   5 217 28.61
26
34
2856 Help Bob   6 273 31.92
21
23
2884 Martian Mining   87 2266 47.78
13
22
3379 String Shuffle   7 389 65.79
17
14
3380 Tourist   28 1021 38.53
19
31
3385 Yoda Goes Palindromic !   3 581 30.45
17
17

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