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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
22675 A conjecture of Paul ErdÅ‘s (hard)   2 5 5.81
34
34
8886 Guess number!   21 5.90
34
34
7490 Biology   14 5.93
14700 Delta catheti II (Hard)   1 3 6.06
41834 Anagrams and GCD   10 6.08
5373 Four Mines   14 6.25
12805 Age of Empires   3 6.41
3902 Fight with functions   3 21 6.47
42
34
13369 Cut on a tree   12 6.63
34481 Galactic Division   2 9 6.67
19301 Operators (new ver)   3 47 6.88
38
17
3 Substring Check (Bug Funny)   9 1083 6.98
40
15
15164 primes triangle (I)   3 78 7.05
34
26
2944 Emmons   7 7.19
9489 Johny Hates Math   26 7.19
19216 Super Mario Revisited   6 22 7.24
20
23
1815 Problems Collection (Volume X)   77 7.26
30961 Non Coprime Sequences(Hard)   4 17 7.32
34
34
9527 Department   11 7.37
34
17
10572 Cheating on the contest   1 30 7.40
17
34
41374 Digit Shifts   1 18 7.60
34
23
17779 Charlie and the Chocolate Factory   4 7.81
49 Hares and Foxes   1 119 7.85
17
26
19133 Base Conversion   1 9 7.86
50
34
34742 Help Robin!!   16 7.87
28
28
1726 Exchange   24 7.92
50
34
3483 Begin   4 7.94
20930 Progression   4 26 8.01
34
34
34315 The Chase   5 8.22
21396 Taklu Kuddus   3 107 8.26
30
24
1441 The Clever Typist   1 34 8.28
17
34
11771 Mountain Cave   1 16 8.31
34
17
22177 RajaRani   3 9 8.33
17
17
41790 Spy Reloaded   6 8.43
15864 SUMMING   2 10 8.45
17
26
12056 Nubulsa Expo   9 8.57
28458 Drawing triangles   28 8.62
5182 Double Sorting   15 8.70
11873 Round Trip   9 8.70
40501 A Simple Sieve   3 7 8.70
45
50
25336 Eefun Plays Doto   4 8.74
34117 Just a Palindrome   1 29 8.76
34
34
15827 Vending Machine   2 36 8.81
6
17
7187 Dinosaur Menace   3 184 8.83
17
34
42049 Maximum Sum of the Array   2 117 8.85
1
3
31591 All in One   8 110 8.90
31
26
2147 Root of a Linear Equation   66 8.90
34
17
5157 Game Simulator   1 23 8.99
50
17
8542 Modern Pocket Calculator   35 9.05
28
6
3884 When (You Believe)   24 9.17

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