rename repo, subdir for yearly challenges

2020/day01/ex1.bash

@@ -0,0 +1,23 @@
+#!/bin/bash
+#
+# ex1.bash: Advent2020 game, day 1/game 1
+
+CMD=$(basename "$0")
+
+readarray -t numbers
+
+declare -i i j a b
+
+for ((i=0; i<${#numbers[@]}; ++i)); do
+	a=$((numbers[i]))
+	for ((j=i+1; j<${#numbers[@]}; ++j)); do
+		b=$((numbers[j]))
+		if ((a+b == 2020)); then
+			printf "${CMD} : %d:%d %d:%d sum=%d mul=%d\n" \
+				   $i $a $j $b \
+				   $((a+b)) $((a*b))
+			break 2
+		fi
+	done
+done
+exit 0