String
Problems
| Length | 678 / 683 | 800 | |
| Word Count | 604 / 629 | 800 | |
| lowercase | 592 / 600 | 800 | |
| Vowel | 553 / 565 | 800 | |
| Digit sum | 560 / 573 | 800 | |
| Strong password | 546 / 557 | 800 | |
| Letter frequencies | 507 / 513 | 800 | |
| Palindrome string | 529 / 532 | 800 | |
| Palindrome substring | 389 / 410 | 800 | |
| Caesar cipher | 383 / 437 | 800 | |
| String occurences | 420 / 432 | 800 | |
| Sum | 357 / 401 | 800 | |
| String normalization | 370 / 413 | 800 | |
| Run-length encoding | 325 / 391 | 800 | |
| Expression | 172 / 192 | 800 |