Initial Commit - days 01-12

day11/ex1-slow.bash

@@ -0,0 +1,175 @@
+#!/bin/bash
+#
+# ex1.bash: Advent2020 game, day 10/game 1.
+
+CMD=${0##*/}
+shopt -s extglob
+
+declare -a rowsstr rows
+declare -i RLENGTH
+declare -i NROWS
+declare floor
+
+function adj() {
+	local -i r="$1" n="$2" c="$3" count=0
+	local -a prow=(${rows[r-1]})
+	local -a row=(${rows[r]})
+	local -a nrow=(${rows[r+1]})
+	#echo
+	#echo p="${prow[*]}"
+	#echo r="${row[*]}"
+	#echo p1=${prow[1]}
+	#echo r1=${row[1]}
+	#return
+	#echo r="$row"
+	#echo n="$nrow"
+	if (( row[n] == 0 )); then
+		echo "-1"
+		return
+	fi
+	for ((i=n-1; i<n+2; ++i)); do
+		#echo p: $i ${prow:i:1}
+		(( prow[i] == c )) && ((count++))
+		#echo p: $i ${nrow:i:1}
+		(( nrow[i] == c )) && ((count++))
+	done
+	(( row[n-1] == c )) && ((count++))
+	(( row[n+1] == c )) && ((count++))
+	echo "$count"
+}
+
+function run() {
+	local -i c r
+	local -a row
+	local -a new
+	local -i cur
+	local -i changed=1
+	local -i loop=0 seated=0
+
+	#echo "$floor;"
+	while ((changed > 0)); do
+		changed=0
+		seated=0
+		for ((r=1; r<=NROWS; ++r)); do
+			row=(${rows[r]})
+			newrow=(0)
+			for ((c=1; c<=RLENGTH; ++c)); do
+				newrow+=("${row[c]}")
+				#if ((r == 1 && c ==1 )); then
+				#   printf "r1c1: %s %d\n" "${row[c]}" $(adj $r $c 2)
+				#fi
+				case ${row[c]} in
+					0) continue
+					   ;;
+					1) if (( $(adj $r $c 2) == 0 )); then
+						   ((++changed))
+						   newrow[c]=2
+					   fi
+					   #printf "[%d][%d]: %s %s %d\n" $r $c "${row[c]}" "${newrow[c]}" $(adj $r $c 2)
+					   ;;
+					2) if (( $(adj $r $c 2) >= 4 )); then
+						   ((++changed))
+						   newrow[c]=1
+					   fi
+					   ;;
+				esac
+				((newrow[c] == 2)) && ((seated++))
+			done
+			newrow+=(0)
+			new[$r]="${newrow[*]}"
+			#echo "${newrow[*]} ;"
+		done
+		#echo "$floor"
+		#echo "${new[*]}"
+		#echo changed=$changed
+		((loop++))
+		#echo loop="$loop"
+		for ((r=1; r<=NROWS; ++r)); do
+			rows[r]="${new[$r]}"
+		done
+		#printf "loop %d seated %d\n" "$loop" "$seated" >&2
+	done
+	echo "$seated"
+}
+
+
+
+readarray -t rowsstr
+
+for ((i=0; i<${#rowsstr[@]}; ++i)); do
+	rowsstr[i]=${rowsstr[i]//./0}
+	rowsstr[i]=${rowsstr[i]//L/1}
+	#echo "${rowsstr[i]}"
+done
+
+RLENGTH=${#rowsstr[0]}
+NROWS=${#rowsstr[@]}
+#echo "L=$RLENGTH N=$NROWS"
+
+# add floor rows at beginning and end
+printf -v floor '%0.s0 ' $(seq 1 $((RLENGTH+2)))
+#echo floor="$floor"
+#echo floor="$floor"
+#echo
+#for ((i=0; i<${#rowsstr[@]}; ++i)); do
+#	rowsstr[i]=0${rowsstr[i]}0
+#	echo "${rowsstr[i]}"
+#done
+
+# split arrays in integers
+for ((r=0; r<NROWS; ++r)); do
+	srow="${rowsstr[r]}"
+	nrow=(0)
+	for ((c=0 ; c<=RLENGTH+1 ; c++ )); do
+		nrow+=("${srow:c:1}")
+	done
+	nrow+=(0)
+	rows[r]="${nrow[*]}"
+done
+rows=("$floor" "${rows[@]}" "$floor")
+#for ((r=0; r<=NROWS+1; ++r)); do
+#	printf "row %d: %s\n" $r "${rows[r]}"
+#done
+
+#for ((r=0; r<=NROWS+1; ++r)); do
+#	echo "row $r=${rows[r]}"
+#done
+#echo -n "adj 1 1 2: "
+#adj 1 1 2
+res=$(run)
+printf "%s: res=%d\n" "$CMD" "$res"
+exit 0
+
+echo -n "adj 1 1 2: "
+adj 1 1 2
+echo -n "adj 1 2 1: "
+adj 1 2 1
+echo -n "adj 1 3 2: "
+adj 1 3 2
+echo -n "adj 1 4 1: "
+adj 1 4 1
+exit 0
+
+
+numbers=(0 "${numbers[@]}")
+size=${#numbers[@]}
+((last=${numbers[size-1]}+3))
+numbers+=("$last")
+((size++))
+#echo S="$size" $last "[${numbers[@]}]"
+
+# last
+declare -a res=(0 0 0 0)
+
+for ((i=1; i<size; ++i)); do
+	prev=${numbers[$i-1]}
+	cur=${numbers[$i]}
+	diff=$((cur-prev))
+	((res[diff]++))
+done
+res1="${res[1]}"
+res3="${res[3]}"
+
+printf "%s : diff1=%d diff2=%d res=%d\n" "$CMD" "$res1" "$res3" $((res1*res3))
+
+exit 0