list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
21135 Distinct Viewpoints   0 0.00
22316 pK   0 0.00
22320 Polynomial Drawing   0 0.00
1797 Cardsharper   0 0.00
3647 Moebius   0 0.00
4476 Playfair Cracker   0 0.00
15381 Cut The Rope   0 0.00
19687 Symmetric matrix 2   0 0.00
19975 Amazing Prime Sequence (hard)   0 0.00
20174 Counting Divisors (cube)   0 0.00
22177 RajaRani   1 0 0.00
23806 Yossy, The King of IRYUDAT   0 0.00
50
50
23876 Board Score   0 0.00
23882 Watchers On The Wall   0 0.00
23930 Overlapping Words   0 0.00
23937 Panda and sets   0 0.00
23971 Birthday Party !!   0 0.00
231 The Zebra Crossing   1 0.37
23133 World Cup 2015   1 0.39
17
17
13098 Yet Another Conic Section Problem   1 0.60
10799 Happiness at the lowest cost   2 0.88
9190 Perfect Maze   20 1.18
1457 Help Blue Mary Please! (Act I)   10 1.23
177 AB-words   13 1.24
15864 SUMMING   1 1.37
17
34
12916 MMM   4 1.46
9967 Playing with Words   3 1.55
1484 Search in XML   8 1.88
22037 Shortest Paths   1 1.89
23351 Hiccup And Lucky Dragons   1 1.89
17
17
6957 Partial Palindrome   1 1.92
9000 Bob and his new kite factory   2 2.06
17320 Guess The Number With Lies v3   1 2.27
5157 Game Simulator   2 2.35
2661 Illumination   4 2.36
2000 Boxes (Hard)   13 2.87
15165 primes triangle (II)   3 2.88
850 Soccer Choreography   3 2.99
14830 The Codefather   3 3.09
1
1
22675 A conjecture of Paul ErdÅ‘s (hard)   1 1 3.23
34
34
2009 Cryptography   70 3.30
12076 Longest Common Subsequence   1 17 3.34
50
50
4948 Integer Factorization (29 digits)   7 3.59
944 Free Tour   16 3.74
15270 A plus B   2 4.08
3902 Fight with functions   16 4.11
6895 Maximum Edge of Powers of Permutation   3 4.17
12579 Search Insert Delete   13 4.55
34
1
16809 Estimation   2 47 4.62
30
14
2019 The Rolling Ball   2 4.88

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