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Ice Road (1230)
Other names: Icewalk
Instruction:
Draw a single loop that passes orthogonally through centers of cells. (The loop does not need to go through all the cells.)
Some cells are shaded, representing "ice". The loop cannot turn in an ice cell. The loop cannot intersect itself in a non-ice cell.
The loop will alternate between going through groups of one or more ice cells and groups of one or more non-ice 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.
Some non-ice 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.