String
Problems
| Length | 1530 / 1542 | 800 | |
| Word Count | 1373 / 1428 | 800 | |
| lowercase | 1353 / 1375 | 800 | |
| Vowel | 1274 / 1296 | 800 | |
| Digit sum | 1273 / 1297 | 800 | |
| Strong password | 1218 / 1241 | 800 | |
| Letter frequencies | 1123 / 1132 | 800 | |
| Palindrome string | 1175 / 1180 | 800 | |
| Palindrome substring | 928 / 960 | 800 | |
| Caesar cipher | 906 / 979 | 800 | |
| String occurences | 939 / 959 | 800 | |
| Sum | 829 / 913 | 800 | |
| String normalization | 832 / 906 | 800 | |
| Run-length encoding | 742 / 840 | 800 | |
| Expression | 554 / 589 | 800 |