Move to have day be 2 digit always

[advent-of-code-2020.git] / day01 / find_2020_factors.sh

diff --git a/day01/find_2020_factors.sh b/day01/find_2020_factors.sh
new file mode 100644 (file)
index 0000000..fa3a5d5
--- /dev/null
+++ b/day01/find_2020_factors.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# read the file straight in for gits and shiggles
+declare -a data
+read -a data -d $'\0' < input.txt
+
+echo "Got ${#data[*]} records"
+
+for a in $(seq 0 $((${#data[*]}-2))); do
+    for b in $(seq $((a+1)) $((${#data[*]}-1))); do
+        if [ $((${data[$a]} + ${data[$b]})) -eq 2020 ]; then
+            echo "Match found: ${data[$a]} + ${data[$b]} = 2020"
+            echo "Multiplied: $((${data[$a]} * ${data[$b]}))"
+            exit 0
+        fi
+    done
+done