Climbing Route

Simple

You have an elevation map and you want to know the shortest climbing route.

The map is given as a list of strings.

0 : plain ( elevation is 0)
1-9 : hill (number is elevation)

"mountain" is adjacent (only 4 directions) hill group.

It consists of two or more hills.
Isolated hill is not mountain.
The highest elevation is the...

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logic
numbers

by:

kurosawa4434

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