Day 4

04/02.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+
+read line
+inputs=( ${line//,/ } )
+read line
+grid_size=5
+i=0
+conditions=''
+columns=()
+last_win=0
+last_score=0
+victory_condition=()
+for j in $(seq $grid_size); do
+  columns+=''
+  victory_condition+=('X')
+done
+victory_condition=${victory_condition[@]}
+
+while read line; do
+  if [[ ! -z "$line" ]] && [ $i -lt $grid_size ]; then
+    conditions=${conditions}$line' ; '
+    current=($line)
+    for j in $(seq $grid_size); do
+      columns[$((j-1))]=${columns[$((j-1))]}${current[$((j-1))]}' '
+    done
+    i=$((i+1))
+  fi
+  if [ $i -eq $grid_size ]; then
+    i=0
+    for j in $(seq $grid_size); do
+      conditions=${conditions}${columns[$((j-1))]}'; '
+    done
+    
+    conditions='; '$conditions
+    for j in $(seq ${#inputs[@]}); do
+      conditions=${conditions// ${inputs[$((j-1))]} / X }
+      if [[ "$conditions" == *"$victory_condition"* ]]; then
+	current_score=$(sed 's/;[^;]*;[^;]*;[^;]*;[^;]*;[^;]*; $//' <<< $conditions)
+	current_score=$(sed 's/[X; ]/+/g' <<< $current_score)
+	current_score=$(sed 's/\+\++/+/g' <<< $current_score)
+	current_score=$(sed 's/\+*$//' <<< $current_score)
+	current_score=$((current_score))
+	current_score=$((current_score*inputs[j-1]))
+	if [ $last_win -eq 0 ] || [ $j -gt $last_win ]; then
+	  last_win=$j
+	  last_score=$current_score
+	fi
+	break
+      fi
+    done
+
+    conditions=''
+    columns=()
+    for j in $(seq $grid_size); do
+      columns+=''
+    done
+  fi
+done
+
+echo $last_score