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Slitherlink (Out-Liars) (558)

Instruction:
Draw a single, non-intersecting loop that only consists of line segments between the dots along the dotted lines. A number inside a cell indicates how many of the edges of that cell are part of the loop when it is inside the loop.
All numbers inside the loop are correct, but all numbers outside the loop are incorrect; they are either one more or one less than the correct number for that cell.

Reference: WPF (1)

Examples:
WPF Puzzle GP 2015 - Round 1 (80)
WPF Puzzle GP 2020 - Round 1 (140)
Parent puzzle:
Slitherlink