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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
2668 Polygon   1 68 20.45
26
34
30945 Non Coprime Sequences   2 22 20.43
50
50
10440 Friends   38 20.42
34260 Signpost reading   8 28 20.41
21
13
13592 Expected Time to Love   1 49 20.40
17
34
3376 Parking Lot   1 143 20.40
17
17
19274 Operators   17 604 20.39
14
20
9260 Perfect Road   16 20.37
17
17
11848 Power with Combinatorics   8 436 20.36
27
39
11391 EASY MATH   27 1461 20.32
19
17
417 The lazy programmer   9 654 20.29
21
23
13362 Median of sub-sequences   1 37 20.28
34
34
5902 Tri   1 79 20.26
34
50
21187 Increasing Shortest Path   2 34 20.25
26
34
27429 Changu Mangu in a Football Team   3 83 20.19
1
34
8586 Factorial factorisation   2 45 20.18
17
17
139 The Long and Narrow Maze   1 211 20.16
17
17
1029 Matrix Summation   53 3559 20.15
15
18
3010 Castle Wall   26 20.15
4305 Drilling   3 121 20.15
17
34
29452 Width of The Lost Box   41 20.14
17
1
23350 Mineral Farm   18 20.13
34
34
2272 Crossing the Desert   54 20.12
1962 Circles   62 20.12
681 Building the Tower   2 105 20.11
17
12
16557 HTML Formatting   3 31 20.11
17
23
34975 Prime Friendly Numbers   10 45 20.11
28
26
3197 Tree Construction   64 20.10
14894 Good Celebration   3 27 20.10
26
30
26913 SUPER CELL   1 37 20.08
17
17
9687 Xavier is Learning to Count   1 46 20.05
39
39
19320 Draw Skyline Graph   2 109 20.02
31
26
14935 Cactus   6 224 20.02
16
14
336 Exchange Operations   1 90 20.00
1
17
9516 XOR Equations   18 20.00
18666 Radiation   2 36 20.00
17
34
861 Counting inversions   7 465 19.98
34
29
3577 Parity   3 83 19.98
17
34
1991 Another Continuous Fractions Problem   1 84 19.97
34
17
8277 Number of Prime Strings   3 112 19.95
23
28
27520 Laser   5 43 19.94
17
17
36710 To the Bird-planet   3 44 19.94
17
14
12004 Cousin Wars   2 36 19.86
26
26
744 Longest Permutation   3 619 19.85
15
19
729 Move your armies   80 19.85
1
1
22331 Intersection Query   1 18 19.85
50
34
2413 Building Beacons   42 19.84
8989 Funny programming contest   3 38 19.84
12
23
31756 The Idol   18 19.83
50
34
4409 Circle vs Triangle   1 61 19.83

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