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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
11180 369 Numbers   17 753 12.30
26
24
3492 Braille Transcription   -1 10 12.32
9691 Triangles and Quadrangle   14 12.32
6 Simple Arithmetics   10 3000 12.36
30
9
36712 Trailing digits   7 61 12.37
13
13
9520 Tanks   1 14 12.41
34
34
684 Another Assignment Problem   1 103 12.41
34
1
1965 Set Cover   2 25 12.42
1
17
149 Fencing in the Sheep   3 95 12.45
34
17
1687 Logic II   1 24 12.50
34
34
9944 Ji-Tu Problem   14 12.50
34353 Smelly Toilets   1 6 12.50
25471 AM FM   2 36 12.53
17
34
10082 Comparing Answers   57 12.59
47 Skyscraper Floors   5 280 12.62
26
17
31036 Ada and Mulberry   4 112 12.63
26
26
12210 High and Low   61 12.63
327 Platon and Socrates   49 12.64
9
34
10800 GAME   21 12.64
13801 Dexter Rank   1 9 12.64
34
34
14929 Subsequence   3 172 12.71
9
15
9508 Magic Bitwise AND Operation   104 12.72
32029 Ada and Connections   6 69 12.72
24
24
1784 IOICamp Sequence   1 318 12.73
1
17
1526 Ranklist Sorting   1 23 12.75
17
34
15360 World Record Lunch   24 12.76
32567 First to meet the spaceship   1 31 12.76
34
17
30828 Class Leader   3 181 12.77
23
28
5158 Heroes Arrangement   12 12.80
188 Rectangles   2 181 12.82
17
23
20926 Special Numbers (Reverse and Add)   1 21 12.83
26
26
15328 Hunter x Hunter   -1 71 12.91
1
17
25810 Divisibility Test   10 57 12.93
24
26
205 Icerink   8 12.94
6720 Paper Fold   19 13.01
2271 Undecodable Codes   46 13.01
26772 Lets Be An Anagrammatist   5 33 13.02
26
21
146 Fast Multiplication Again   36 13.03
13420 Fimodacci   3 36 13.03
12
26
278 Bicycle   55 13.03
34
1
241 Arranging the Blocks   52 13.04
245 Square Root   4 564 13.05
20
10
18522 Tours   22 13.10
42
26
11851 Power with Combinatorics(HARD)   1 127 13.10
34
42
35337 Faketorial Hashing   1 10 13.16
34
34
5014 Crazy Receptionist   11 13.18
5155 Exciting Time   39 13.19
2371 Another Longest Increasing Subsequence Problem   15 764 13.22
29
33
3972 Stargates   45 13.29
15435 Schedules   23 13.33

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