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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
1841 Prime Path   336 10343 57.89
19
18
7742 Onotole needs your help   138 10038 41.00
4
11
5449 Seinfeld   188 9504 40.07
8
11
7733 Happy Numbers I   89 9333 53.37
8
8
206 Bitmap   245 9317 27.94
15
16
10582 subarrays   215 9241 34.31
11
13
7406 Beehive Numbers   38 9164 58.87
5
9
328 Bishops   82 8906 32.03
14
7
9861 Hotels Along the Croatian Coast   210 8840 41.56
10
12
97 Party Schedule   250 8792 36.12
14
16
4560 The Double HeLiX   146 8776 37.58
12
10
345 Mixtures   254 8715 36.48
17
21
27 Sorting Bank Accounts   53 8677 40.49
11
6
31 Fast Multiplication   48 8606 20.64
15
12
740 Treats for the Cows   260 8465 42.60
13
14
2178 He is offside!   5 8344 50.12
3
4
11515 I AM VERY BUSY   151 8264 45.24
9
11
1028 Hubulullu   60 8195 58.76
2
15
39 Piggy-Bank   139 8066 35.44
14
16
1805 Largest Rectangle in a Histogram   222 8042 27.59
18
24
8670 THE MAX LINES   29 8006 36.84
4
10
78 Marbles   67 7863 34.96
15
13
12471 DIE HARD   156 7843 39.09
11
14
4580 ABCDEF   216 7772 29.20
14
16
8061 Christmas Play   57 7721 48.24
6
4
12323 Minimum Knight moves !!!   128 7647 42.23
15
11
8612 Penney Game   39 7622 67.55
4
3
15 The Shortest Path   156 7456 24.12
17
12
4452 Simple Arithmetics II   55 7442 42.38
11
5
5699 The last digit re-visited   39 7437 31.67
9
9
9921 ABC Path   158 7342 21.80
15
12
14932 Lowest Common Ancestor   230 7308 29.17
15
15
6470 Finding the Kth Prime   48 7115 27.24
19
14
9788 Friends of Friends   66 7106 63.23
7
5
6471 Printing some primes   68 6863 28.59
13
12
15965 PLAY WITH MATH   60 6821 46.45
4
5
4033 Phone List   149 6791 31.33
16
14
2906 GCD2   60 6786 36.48
12
11
8001 Fibonacci Sum   177 6755 27.70
19
19
7718 Number of common divisors   85 6726 25.03
11
13
8869 Roti Prata   60 6691 39.86
16
18
12150 Just Next !!!   74 6506 23.10
12
11
7169 Pizza   46 6413 29.97
10
8
3693 Maximum Sum   57 6356 42.02
19
18
2716 Maximal Quadrilateral Area   -1 6216 50.28
3
8
9494 Just Add It   76 6197 47.90
11
10
1688 A Very Easy Problem!   40 6162 49.24
12
11
10286 DOTA HEROES   43 6024 44.99
3
5
91 Two squares or not two squares   79 5997 24.55
11
14
21357 Crucial Equation   79 5995 38.15
4
9

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