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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
5699 The last digit re-visited   39 7439 31.68
9
9
7804 Defense of a Kingdom   39 4842 25.34
10
12
8551 Colours A, B, C, D   39 2152 21.20
10
21
12474 MAXIMUM WOOD CUTTER   39 1552 41.80
15
14
15454 How to Handle the Fans   39 1509 50.27
12
11
23132 Travelling cost   39 1596 32.97
10
8
66 Cross-country   38 4059 64.54
11
12
709 The day of the competitors   38 1547 28.85
17
27
7212 Find String Roots   38 2141 34.83
12
15
7406 Beehive Numbers   38 9171 58.88
5
9
8612 Penney Game   38 7629 67.55
4
3
12880 Sheep   38 1772 45.21
10
10
25893 Longest Perfect Increasing Subsequence   38 682 39.25
8
12
26 Build the Fence   37 2205 28.18
22
17
151 The Courier   37 1034 35.66
22
23
338 Roads   37 1380 23.85
17
22
526 Divisors   37 1682 43.59
14
13
1847 No Change   37 1671 36.23
11
14
2053 Key Task   37 1172 31.68
24
22
2727 Army Strength   37 14479 41.23
4
4
3261 Race Against Time   37 1052 23.94
21
21
4408 Build a Fence   37 12217 44.78
4
5
11373 Coke madness   37 3803 34.88
5
8
14138 Amazing Factor Sequence   37 2317 37.04
11
11
15086 Land Acquisition   37 1303 28.31
24
30
8952 Catapult that ball   36 2784 26.28
12
12
9340 Arbitrage   36 1782 39.12
11
17
10239 Between the Mountains   36 5776 39.11
7
7
10790 G-One Numbers   36 2066 48.29
16
19
32945 Ada and Subsequence   36 1013 46.49
7
8
6171 Majority   35 5307 43.13
6
7
10738 Ra-One Numbers   35 1523 33.99
18
22
10381 Search in the dictionary!   34 1366 25.91
17
11
14834 Foxlings   34 1072 28.63
18
12
16211 Boring Factorials   34 1863 34.68
12
17
22455 SUM OF PRODUCT   34 1046 17.79
18
20
22461 Smallest Number   34 753 26.99
13
15
24998 PLAYING WITH BITS   34 774 22.07
13
13
26607 CODER FIRST PROBLEM   34 1339 57.21
6
7
30669 Ada and Trip   34 857 30.41
14
11
1811 Longest Common Substring   33 3076 21.32
20
18
4259 Pilots   33 1599 31.77
17
20
5977 Weird Function   33 1134 18.84
18
16
8132 Street Trees   33 3071 46.96
6
11
13043 The Mirror of Galadriel   33 5908 64.50
2
3
13630 BATMAN1   33 585 38.68
20
22
28404 Ada and Field   33 548 25.73
21
17
8 Complete the Sequence!   32 4374 37.86
16
18
666 Con-Junctions   32 983 40.61
14
19
6285 Another Game With Numbers   32 1221 30.54
11
13

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