list of challenge problems
| < Previous | 1 | 2 | 3 | Next |
| ID | NAME | CODE | USERS | ACC % |
|---|---|---|---|---|
| 18901 | The Secret Recipe | CEBITO | 45 | 77.84 |
| 18931 | Sum of primes | SUMPRIM1 | 55 | 25.20 |
| 19205 | Modular Bernoulli | MODBERN | 6 | 67.21 |
| 19206 | Power Sum | PWSUMC | 39 | 52.92 |
| 19397 | Fibonacci Power Sum | PWSUMF | 17 | 56.02 |
| 19558 | PPrimes | PPRIME | 131 | 57.15 |
| 19972 | Counting triangles 2 | CT2 | 9 | 52.94 |
| 20651 | Reliability of Logic Circuits | ZRELY1 | 49 | 66.56 |
| 22217 | Help Santa Claus to Pack the Toys | XMAS2014 | 5 | 65.64 |
| 26321 | God Number is 20 (Rubik) | GODNIS20 | 25 | 65.86 |
| 27840 | Seedlings | SEE | 34 | 74.94 |
| 27841 | Sabotage | SAB | 30 | 56.33 |
| 30830 | 128bit-Fibonacci | FIB128 | 24 | 44.16 |
| 31362 | Matrix Multiplication 4K | MATRMUL | 5 | 36.36 |
| 31757 | Hamster | HAM | 15 | 62.24 |
| 31758 | Artisticity | ART | 3 | 68.97 |
| 34316 | Chess Variants Showdown | CHE | 1 | 70.25 |
| 34317 | Materializer | MATE | 10 | 42.78 |
| 41043 | Odwracanie kartek - Pages reading | MWPZ031 | 16 | 23.53 |
| 41045 | Obrazy i pokoje - Rooms and Pictures | MWPZ029 | 17 | 21.84 |
| 41047 | Wieża z wiader - Bucket tower | MWPZ034 | 21 | 16.28 |
| 41224 | Skarbonka | MPPZF | 21 | 26.51 |
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