String
Problems
| Length | 581 / 586 | 800 | |
| Word Count | 512 / 532 | 800 | |
| lowercase | 511 / 516 | 800 | |
| Vowel | 473 / 483 | 800 | |
| Digit sum | 475 / 485 | 800 | |
| Strong password | 464 / 477 | 800 | |
| Letter frequencies | 433 / 435 | 800 | |
| Palindrome string | 449 / 452 | 800 | |
| Palindrome substring | 329 / 348 | 800 | |
| Caesar cipher | 322 / 369 | 800 | |
| String occurences | 354 / 365 | 800 | |
| Sum | 309 / 345 | 800 | |
| String normalization | 319 / 358 | 800 | |
| Run-length encoding | 269 / 328 | 800 | |
| Expression | 118 / 136 | 800 |