list of challenge problems
| < Previous | 1 | 2 | 3 | Next |
| ID | NAME | CODE | USERS | ACC % |
|---|---|---|---|---|
| 17820 | Guess The Number With Lies v5 | GUESSN5 | 72 | 72.66 |
| 18073 | Colour Brick Game | BRICKGM | 52 | 88.66 |
| 18837 | Boring Factorials (Ultimate) | BORING3 | 24 | 50.36 |
| 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 |
| 22717 | Kejriwal And Broom | CDGLF1 | 303 | 56.77 |
| 22733 | AAP Volunteers | CDGLF2 | 10 | 63.64 |
| 22734 | Mr Phoenix And OR Operation | CDGLF3 | 6 | 52.17 |
| 22739 | Majority Party | CDGLF4 | 9 | 53.95 |
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