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\$\begingroup\$ I knew I had written that Labyrinth program before... here is the same challenge but with negative numbers as well (which makes a surprisingly big difference for some languages, so I don't think they're dupes). \$\endgroup\$– Martin EnderCommented Feb 12, 2016 at 18:06
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\$\begingroup\$ @MartinBüttner Looks like that one doesn't include negative numbers: "-n (where n is an integer) is not counted as a negative n, but as a hyphen followed by n." \$\endgroup\$– PaulCommented Feb 13, 2016 at 3:18
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\$\begingroup\$ Oh, I see what you mean. You're saying it has hyphens and this one doesn't. \$\endgroup\$– PaulCommented Feb 13, 2016 at 3:20
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