aoc2024/d03/run.awk

# run with
# grep -oP 'mul\([0-9]+[,][0-9]+\)|do\(\)|don.?t\(\)' input | tr '(,)' '\t\t\t' | awk -f this.awk

BEGIN {
	run = 1
}

$1 == "mul" {
	m = $2 * $3
	P1 += m
	if (run) {
		P2 += m
	}
}

$1 == "don't" {
	run = 0
}

$1 == "do" {
	run = 1
}

END {
	print P1, P2
}