1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
- setup: cleanup: args: input: | | 1 | / \ | 2 3 | / / \ | 4 5 6 | \ | 7 output: | | 27 | / \ | 26 25 | / / \ | 24 23 22 | \ | 21