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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
30973 Ada and Tomato   4 54 17.74
30
34
22274 Missing Side   1 87 17.74
17
9
391 Railroads   84 17.74
17
17
2709 Untitled Problem   27 17.75
2273 Ferries   29 17.75
30691 Ada and Diary   1 55 17.77
1
1
2485 Phone Lines   18 17.80
8284 Weighted Sum   6 508 17.80
9
13
31342 Simple Path   11 17.81
22455 SUM OF PRODUCT   34 1041 17.82
18
20
16267 Real Numbers   2 169 17.82
26
26
9687 Xavier is Learning to Count   1 28 17.84
39
39
2141 Golden Garden   17 17.86
16483 Lucky Cities   2 29 17.86
17
26
18393 Hamiltonian Cycles   1 25 17.89
17
17
7563 Hi6   37 17.90
26
26
34357 Ludic Numbers (hard)   2 4 17.91
26721 I LOVE Kd-TREES III   4 77 17.91
34
34
36671 Bipartite Permutation (Hard)   6 51 17.91
32
34
23541 CWC-2015   8 142 17.93
17
17
2511 Magic Program IV   27 17.99
7232 Inversion Sort   5 152 17.99
32
23
5511 Heavy Sequences   79 18.00
34
34
18666 Radiation   1 29 18.00
700 Branch Prediction   74 18.00
4305 Drilling   3 96 18.01
17
34
4421 Irreducible polynomials over GF2   62 18.01
10877 Decoys and Diversions   45 18.03
9
17
3983 Right Triangle Counting   3 188 18.05
30
21
413 Word Puzzles   4 364 18.07
30
14
9516 XOR Equations   14 18.07
4003 Subway planning   40 18.08
6956 IOI2009 Mecho   3 159 18.10
28
23
13886 BLOCK_D SOLVER   2 17 18.10
17
26
21414 Count The Indexes 2   5 41 18.11
37
24
5672 Captain Selection   2 18.18
12004 Cousin Wars   2 32 18.18
26
26
12370 Generating Alien DNA   1 31 18.18
34
34
26183 Laser Beam 2.0   1 4 18.18
17
17
26893 Pristojba   2 16 18.18
26
50
30351 Quest Hunter   10 18.18
33049 Ada and Chess   5 38 18.18
26
17
3106 Dictionary Subsequences   3 162 18.20
17
17
34910 Easy Math   2 592 18.23
2
4
35954 New Data Type   118 18.23
8
8
3107 Odd Numbers of Divisors   27 1039 18.24
22
22
38365 Asacoco Prescription   2 42 18.25
17
26
7155 Test   10 362 18.26
34
27
32683 Ada and Kohlrabi   5 67 18.28
30
13
3643 Traffic Network   89 2088 18.30
18
21

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