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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
2426 Palindromes   10 1026 24.80
16
15
2526 Decoding   9 1041 36.51
23
15
3363 Svada   10 496 28.88
9
15
3484 Crossbits   3 99 15.25
23
15
3587 Prime Again   11 879 16.45
20
15
3973 0 0 Pairs   4 806 27.34
15
15
7976 Sum the Square   7 560 26.24
12
15
11404 Save Thy Toys   70 2830 30.19
12
15
12030 Blackout   5 376 44.48
20
15
13768 An Experiment by Penny   8 607 59.70
6
15
16283 Treasure Island   5 136 24.94
17
15
17406 Cheating a Boolean Tree   5 126 35.34
23
15
21572 Marble & store   3 135 19.58
17
15
29367 VEGETABLE SHOPKEEPER 3   6 111 40.70
15
15
30454 Luke vs. Darth Vader   15 225 22.33
16
15
30499 TWO STRINGS   6 26 28.75
15
15
34621 NARUTO AND HILLS   8 48 38.03
20
15
34826 Shinchan and Magic Card   6 117 45.52
6
15
35295 zig-zag on the golden river   11 124 22.97
9
15
36670 Bipartite Permutation   14 370 46.34
6
15
40379 Arithmetic Progression Query   9 91 30.43
15
15
40667 Ambitious XOXO   6 47 51.05
11
15
14932 Lowest Common Ancestor   234 7944 29.25
15
15
1837 Pie   60 4131 30.45
18
15
13388 Easy Jug   24 2161 42.08
6
15
7212 Find String Roots   39 2181 34.82
12
15
16909 Critical Edges   50 1923 28.73
13
15
30755 Ada and GCD   21 458 21.95
27
15
739 The Moronic Cowmpouter   19 3062 50.64
11
15
5161 Factorial vs Power   14 1140 25.97
13
15
1538 Making Jumps   11 1466 38.91
16
15
5970 Finding Primes   22 1345 27.95
16
15
7015 Party   -1 1058 51.01
3
15
9126 Time to live   48 2058 37.70
12
15
16776 Modems   13 222 30.35
19
15
26350 TWO SEQUENCES PROBLEM   12 271 31.69
10
15
26777 Mr. Ant & His Problem   12 243 35.32
14
15
665 String it out   22 1221 38.84
12
15
12245 Natalia Plays a Game   10 935 44.00
14
15
15560 Help the old King   15 554 37.22
15
15
22461 Smallest Number   34 775 27.58
13
15
23 Pyramids   -19 5734 36.67
9
15
3944 Bee Walk   19 1434 56.39
12
15
3979 Whirligig number   8 1030 38.07
10
15
5979 Yet Another Permutations Problem   5 1358 49.53
7
15
12734 Seating Arrangement   7 165 60.52
6
15
16046 Help Professor   6 402 47.67
8
15
17113 Finding the Tesserect   15 928 37.27
11
15
17627 Family members   5 432 60.12
9
15
18467 A Brief Expedition   11 277 54.42
15
15

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