String
Problems
| Length | 611 / 616 | 800 | |
| Word Count | 538 / 563 | 800 | |
| lowercase | 537 / 543 | 800 | |
| Vowel | 500 / 509 | 800 | |
| Digit sum | 501 / 511 | 800 | |
| Strong password | 488 / 502 | 800 | |
| Letter frequencies | 457 / 460 | 800 | |
| Palindrome string | 475 / 478 | 800 | |
| Palindrome substring | 353 / 373 | 800 | |
| Caesar cipher | 345 / 393 | 800 | |
| String occurences | 382 / 393 | 800 | |
| Sum | 327 / 365 | 800 | |
| String normalization | 335 / 375 | 800 | |
| Run-length encoding | 288 / 349 | 800 | |
| Expression | 142 / 162 | 800 |