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#!/bin/bash
inputs="$(<$1)"
while read i
do
inputs="`echo "$inputs" | sed 1d`"
while read x
do
while read z
do
sum=$(($x + $i + $z))
if [ $sum -eq 2020 ]
then
echo $(($x * $i *$z))
exit 0
fi
done <<< $inputs
done <<< $inputs
done <<< $inputs
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