String
Problems
| Length | 1503 / 1515 | 800 | |
| Word Count | 1351 / 1404 | 800 | |
| lowercase | 1334 / 1354 | 800 | |
| Vowel | 1259 / 1281 | 800 | |
| Digit sum | 1258 / 1282 | 800 | |
| Strong password | 1209 / 1231 | 800 | |
| Letter frequencies | 1113 / 1122 | 800 | |
| Palindrome string | 1161 / 1166 | 800 | |
| Palindrome substring | 918 / 950 | 800 | |
| Caesar cipher | 894 / 967 | 800 | |
| String occurences | 928 / 948 | 800 | |
| Sum | 818 / 902 | 800 | |
| String normalization | 825 / 898 | 800 | |
| Run-length encoding | 732 / 829 | 800 | |
| Expression | 548 / 584 | 800 |