String
Problems
| Length | 1033 / 1040 | 800 | |
| Word Count | 925 / 960 | 800 | |
| lowercase | 922 / 934 | 800 | |
| Vowel | 862 / 877 | 800 | |
| Digit sum | 869 / 887 | 800 | |
| Strong password | 840 / 856 | 800 | |
| Letter frequencies | 777 / 784 | 800 | |
| Palindrome string | 812 / 817 | 800 | |
| Palindrome substring | 635 / 660 | 800 | |
| Caesar cipher | 606 / 677 | 800 | |
| String occurences | 656 / 672 | 800 | |
| Sum | 562 / 626 | 800 | |
| String normalization | 566 / 626 | 800 | |
| Run-length encoding | 505 / 595 | 800 | |
| Expression | 347 / 374 | 800 |