String
Problems
| Length | 454 / 458 | 800 | |
| Word Count | 408 / 424 | 800 | |
| lowercase | 402 / 407 | 800 | |
| Vowel | 370 / 379 | 800 | |
| Digit sum | 370 / 379 | 800 | |
| Strong password | 370 / 379 | 800 | |
| Letter frequencies | 348 / 350 | 800 | |
| Palindrome string | 355 / 358 | 800 | |
| Palindrome substring | 261 / 277 | 800 | |
| Caesar cipher | 255 / 293 | 800 | |
| String occurences | 283 / 292 | 800 | |
| Sum | 244 / 273 | 800 | |
| String normalization | 257 / 288 | 800 | |
| Run-length encoding | 213 / 267 | 800 | |
| Expression | 77 / 89 | 800 |