String
Problems
| Length | 1565 / 1577 | 800 | |
| Word Count | 1409 / 1464 | 800 | |
| lowercase | 1388 / 1409 | 800 | |
| Vowel | 1312 / 1334 | 800 | |
| Digit sum | 1311 / 1337 | 800 | |
| Strong password | 1253 / 1276 | 800 | |
| Letter frequencies | 1156 / 1166 | 800 | |
| Palindrome string | 1206 / 1212 | 800 | |
| Palindrome substring | 955 / 987 | 800 | |
| Caesar cipher | 934 / 1011 | 800 | |
| String occurences | 963 / 983 | 800 | |
| Sum | 842 / 928 | 800 | |
| String normalization | 843 / 918 | 800 | |
| Run-length encoding | 755 / 853 | 800 | |
| Expression | 563 / 600 | 800 |