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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
279 Interesting number   26 846 24.20
19
24
1557 Can you answer these queries II   26 1793 25.06
28
35
1728 Common Permutation   26 4201 46.71
6
6
1840 Printer Queue   26 2997 48.07
14
9
4053 Card Sorting   26 696 43.66
22
27
4201 Coder Ratings   26 1397 35.83
15
18
4235 Wandering Queen   26 869 14.98
24
19
4343 Empty Boxes   26 3582 65.99
2
13
7217 Training for final   26 2101 45.57
8
6
9066 Sum of Distinct Numbers   26 360 14.77
32
32
10676 0110SS   26 1772 41.09
13
9
11985 Gao on a tree   26 875 15.24
28
27
13384 Nice Binary Trees   26 1840 39.88
9
13
14543 Range Sum   26 1014 38.04
11
12
15648 Commando   26 869 33.51
27
34
16121 MODIFY SEQUENCE   26 2380 48.49
6
7
3107 Odd Numbers of Divisors   27 1072 18.44
22
22
4487 Can you answer these queries VI   27 1367 23.62
34
28
6168 Building Bridges   27 1665 25.98
11
17
11391 EASY MATH   27 1461 20.32
19
17
15650 Dark roads   27 1575 36.53
10
10
27381 Emoticon   27 865 49.86
8
14
3380 Tourist   28 1170 37.79
19
31
3477 Baby   28 955 46.67
21
24
8547 Euclids algorithm revisited   28 1474 22.86
19
23
9722 Insertion Sort   28 4083 31.42
12
12
10471 Aliens at the train, again!   28 815 44.66
16
16
10620 KNJIGE   28 1450 44.45
5
18
12151 Pizzamania   28 2187 28.66
5
4
12612 Path of the righteous man   28 505 36.07
20
22
15267 FRIEND CIRCLE   28 1442 28.43
13
11
28306 Ada and Queue   28 2520 26.02
11
9
48 Glass Beads   29 3479 38.09
15
18
50 Invitation Cards   29 1783 43.12
16
18
110 Fill the Cisterns   29 1425 31.42
21
20
3375 Stamps   29 13790 41.72
5
3
4031 Mass of Molecule   29 2611 48.18
12
9
6691 Picking Up Chicks   29 2263 32.14
11
18
8670 THE MAX LINES   29 8046 36.87
4
10
9820 Through the troops   29 2059 44.44
12
11
22268 Euler Totient Function Sieve   29 409 19.57
23
21
27269 Cube Numbers   29 615 30.99
9
11
34020 Ada and Pet   29 655 26.99
13
19
1025 Fashion Shows   30 27880 46.43
3
3
2277 Silly Sort   30 882 55.45
17
27
4082 BLAST   30 1761 51.74
9
16
4226 Japan   30 1803 23.39
16
19
4556 Think I will Buy Me a Football Team   30 2189 45.16
7
11
5976 Traversing Grid   30 3721 58.56
6
10
8725 Closest Point Pair   30 2068 20.75
18
21

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