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rhowe/4.sh

Created February 20, 2020 17:15
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AOC2019day4
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4.sh
#!/bin/bash
set -eu
seq ${1%-*} ${1#*-} \
| grep -E '(00|11|22|33|44|55|66|77|88|99)' \
| grep -cEv '(10|2[01]|3[0-2]|4[0-3]|5[0-4]|6[0-5]|7[0-6]|8[0-7]|9[0-8])'
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