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rhowe/4-2.sh

Created February 20, 2020 17:15
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AOC2019day4part2
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4-2.sh
#!/bin/bash
set -eu
set -o pipefail
thisisfine=$(seq 0 9 | sed 's/.*/^&&[^&]|[^&]&&[^&]|[^&]&&$/' | xargs | tr \ \|)
seq "${1%-*}" "${1#*-}" \
| grep -Ev '10|2[01]|3[0-2]|4[0-3]|5[0-4]|6[0-5]|7[0-6]|8[0-7]|9[0-8]' \
| grep -cE "$thisisfine"
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