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Flooded Road (1231)
Other names: Waterwalk
Instruction:
Draw a single loop that passes orthogonally through centers of cells. (The loop does not need to go through all the cells.) The loop cannot intersect itself or enter the same cell more than once.
Some cells have wavy lines, representing "water". The loop will alternate between going through groups of one or more water cells and groups of one or more non-water cells. Consider each one of these groups to be a "road segment"; the number of cells in each road segment is the size of that road segment.
Every road segment with water cells must have a size of at most 2.
Some non-water cells are marked with numbers. The loop must pass through all cells with numbers. Each number is the size of the road segment that number's cell belongs to.