+ day 3

3_1.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+arr=()
+gamma=''
+epsilon=''
+
+while read line; do
+	arr+=("$line")
+done
+
+for ((j=0; j<${#arr[0]}; j++)); do
+	zeroes=0
+	ones=0
+	for ((i=0; i<${#arr[@]}; i++)); do
+		if [[ "$(cut -c $((j+1)) <<< "${arr[$i]}")" == *"0"* ]]; then # lazy
+			zeroes=$((zeroes+1))
+		else
+			ones=$((ones+1))
+		fi
+	done
+	if [[ $zeroes -gt $ones ]]; then
+		gamma=${gamma}0
+		epsilon=${epsilon}1
+	else
+		gamma=${gamma}1
+		epsilon=${epsilon}0
+	fi
+done
+
+gamma_=$((2#$gamma))
+epsilon_=$((2#$epsilon))
+
+echo "result: $((gamma_*epsilon_))"

3_2.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+yarr=()
+arr_=()
+zeroes=0
+ones=0
+
+while read line; do
+	yarr+=("$line")
+done
+
+function asdf() {
+	arr=(${yarr[@]})
+	for ((i=0; i<${#arr[0]}; i++)); do
+		for ((j=0; j<${#arr[@]}; j++)); do
+			if [[ $(cut -c$((i+1)) <<< "${arr[$j]}") == 0 ]]; then
+				zeroes=$((zeroes+1))
+			else
+				ones=$((ones+1))
+			fi
+		done
+		if [[ $zeroes -lt $ones && $1 == 1 || $zeroes == $ones && $1 == 1 ]] || \
+		   [[ $zeroes -gt $ones && $1 == 0 ]]; then
+			for ((j=0; j<${#arr[@]}; j++)); do
+				[[ $(cut -c$((i+1)) <<< "${arr[$j]}") == "0" ]] && arr_+=("${arr[$j]}")
+			done
+		else
+			for ((j=0; j<${#arr[@]}; j++)); do
+				[[ $(cut -c$((i+1)) <<< "${arr[$j]}") == "1" ]] && arr_+=("${arr[$j]}")
+			done
+		fi
+		arr=(${arr_[@]})
+		arr_=()
+
+		if [[ "${#arr[@]}" == 1 ]]; then
+			break
+		fi
+		zeroes=0
+		ones=0
+	done
+}
+
+asdf 0
+echo 0: ${arr[0]}
+uwu=${arr[0]}
+asdf 1
+owo=${arr[0]}
+echo 1: ${arr[0]}
+
+echo $((2#$uwu*2#$owo))