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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
40083 Just Primes   11 120 29.69
15
17
4201 Coder Ratings   26 1397 35.83
15
18
18176 FRIENDSHIP!!!   16 631 26.95
15
21
6294 Yodaness Level   74 3568 49.30
15
16
50 Invitation Cards   29 1771 43.02
16
18
1677 Halloween treats   8 994 39.61
16
21
5301 Query Problem   7 693 37.42
16
22
10395 Sum of divisors!   25 2376 27.04
16
18
25780 Decreasing Number of Visible Box   18 253 39.73
16
16
26703 All about Sorting!   10 87 42.09
16
17
30947 Sabbir and gifts   21 368 32.62
16
13
10810 Its a Murder!   56 2396 22.11
16
16
10471 Aliens at the train, again!   28 814 44.91
16
16
22393 KATHTHI   57 2137 33.18
16
17
7259 Light Switching   102 4626 34.03
16
15
3964 Investment Money   15 622 25.73
16
17
4226 Japan   30 1795 23.39
16
19
13015 Counting Primes   33 1457 22.37
16
14
14935 Cactus   6 211 20.17
16
14
26193 Lost and survived   46 837 35.29
16
12
27217 Minimum Sum   13 188 41.30
16
12
4164 A conjecture of Paul ErdÅ‘s   24 2608 43.77
16
15
25773 Bit Difference   19 420 34.80
16
20
1798 Assistance Required   14 2369 44.86
16
7
2742 Summing Sums   17 920 19.08
16
23
9458 Ghosts having fun   10 219 12.12
16
24
25784 Bubble Sort   10 724 21.33
16
17
34686 Meet Her Fast!   8 143 41.91
16
12
35284 Digit Root   13 105 35.99
16
20
8 Complete the Sequence!   32 4487 36.80
16
18
1538 Making Jumps   11 1463 38.87
16
15
5732 Paradox   43 1239 27.86
16
19
21083 Lexicographically Smallest   14 248 33.07
16
17
30454 Luke vs. Darth Vader   15 224 22.23
16
15
4033 Phone List   151 7270 31.78
16
14
203 Potholers   22 2278 26.47
16
12
2530 Tiling a Grid With Dominoes   60 2433 64.88
16
24
5970 Finding Primes   22 1343 27.93
16
15
26575 Grand Reward   9 433 58.85
16
8
30919 Sabbir and gcd problem   17 332 22.95
16
16
6256 Inversion Count   533 17882 31.94
16
18
7208 Black or White   58 1479 42.43
16
19
4168 Square-free integers   14 758 46.21
16
21
10366 Play with Dates   9 1431 38.72
16
6
15620 Postering   16 718 33.84
16
21
4103 Extend to Palindrome   44 2545 30.33
16
17
17725 Bad XOR   50 1043 23.76
16
22
3408 DNA Sequences   47 1989 26.12
16
20
15562 Find Lexicographically Smallest Permutation   13 363 40.49
16
13
7386 Activities   62 1441 25.52
16
19

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