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#!/usr/bin/gawk -f
function sort_page_numbers(i1, v1, i2, v2)
{
if (v1 in rules[v2])
return +1
if (v2 in rules[v1])
return -1
return 0
}
BEGIN { FS = "[|,]" }
/\|/ { rules[$1][$2] = 1 }
/,/ {
delete seen
badent = 0
for (i = 1; i <= NF; i++) {
for (j in seen) {
if (j in rules[$i])
badent = 1
}
seen[$i] = 1
}
if (!badent)
next
split($0, xs)
asort(xs, xs, "sort_page_numbers")
mid += xs[(NF + 1) / 2]
}
END { print mid }
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