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54 lines
1.1 KiB
Bash
54 lines
1.1 KiB
Bash
#!/usr/bin/env bash
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set -e;
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cd "$(dirname "$0")";
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run_comp() {
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IFS="," read -r -a ops < ./input;
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i=0;
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ops[1]=$1;
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ops[2]=$2;
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while true; do
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op="${ops[i]}";
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case "$op" in
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1|2)
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inputa="${ops[i+1]}";
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inputb="${ops[i+2]}";
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output="${ops[i+3]}";
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i=$((i + 4));
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a="${ops[inputa]}"
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b="${ops[inputb]}"
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if [ "$op" -eq "1" ]; then
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x=$((a + b));
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else
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x=$((a * b));
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fi
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ops[output]=$x;
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;;
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99)
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break;
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;;
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*)
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echo "Invalid op: $op";
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exit 1;
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;;
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esac
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done
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echo "${ops[0]}";
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}
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echo "part 1: ";
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run_comp 12 2;
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echo;
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echo "part 2: ";
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for noun in $(seq 1 99); do
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for verb in $(seq 1 99); do
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if [ "$(run_comp $noun $verb)" -eq 19690720 ]; then
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echo "$((100 * noun + verb))";
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exit;
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fi
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done;
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done;
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