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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
1841 Prime Path   336 10395 57.92
19
18
7742 Onotole needs your help   138 10060 41.03
4
11
5449 Seinfeld   188 9511 40.08
8
11
206 Bitmap   245 9391 28.00
15
16
7733 Happy Numbers I   89 9350 53.37
8
8
10582 subarrays   215 9272 34.30
11
13
7406 Beehive Numbers   38 9177 58.88
5
9
328 Bishops   82 8924 32.00
14
7
9861 Hotels Along the Croatian Coast   210 8871 41.58
10
12
97 Party Schedule   250 8825 36.14
14
16
4560 The Double HeLiX   147 8798 37.59
11
10
345 Mixtures   255 8789 36.44
17
21
27 Sorting Bank Accounts   53 8751 40.42
11
6
31 Fast Multiplication   48 8709 20.70
15
12
740 Treats for the Cows   261 8501 42.61
13
14
2178 He is offside!   5 8365 50.10
3
4
11515 I AM VERY BUSY   151 8320 45.23
9
11
1028 Hubulullu   60 8202 58.75
2
15
1805 Largest Rectangle in a Histogram   225 8099 27.65
18
23
39 Piggy-Bank   139 8090 35.43
14
16
8670 THE MAX LINES   29 8011 36.85
4
10
78 Marbles   67 7889 34.96
15
13
12471 DIE HARD   157 7876 39.02
12
14
4580 ABCDEF   218 7789 29.21
14
16
12323 Minimum Knight moves !!!   129 7789 42.27
15
11
8061 Christmas Play   57 7730 48.25
6
4
8612 Penney Game   38 7639 67.56
4
3
15 The Shortest Path   156 7493 24.10
17
12
4452 Simple Arithmetics II   55 7449 42.37
11
5
5699 The last digit re-visited   39 7442 31.68
9
9
9921 ABC Path   159 7414 21.79
15
12
14932 Lowest Common Ancestor   230 7389 29.17
15
15
6470 Finding the Kth Prime   48 7247 27.30
19
14
9788 Friends of Friends   66 7111 63.23
7
5
6471 Printing some primes   69 7016 28.55
13
11
4033 Phone List   151 6903 31.48
16
14
8869 Roti Prata   61 6854 39.83
15
17
15965 PLAY WITH MATH   60 6838 46.43
4
5
7718 Number of common divisors   86 6819 25.01
12
13
2906 GCD2   60 6792 36.48
12
11
8001 Fibonacci Sum   178 6782 27.70
19
19
12150 Just Next !!!   74 6538 23.06
12
11
7169 Pizza   45 6417 29.97
10
8
3693 Maximum Sum   57 6405 42.11
19
18
2716 Maximal Quadrilateral Area   -1 6225 50.28
3
8
9494 Just Add It   76 6224 47.84
11
10
1688 A Very Easy Problem!   40 6165 49.23
12
11
21357 Crucial Equation   80 6039 38.22
4
9
10286 DOTA HEROES   44 6032 45.01
3
5
91 Two squares or not two squares   79 6008 24.56
11
14

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