14_2 solves part 1 and 2

14/14.awk

@@ -0,0 +1,51 @@
+BEGIN{ RS = "" }
+NR==1{
+	template = $0
+	RS ="\n"
+	next
+}
+{
+	pair[NR] = $1
+	ins[NR] = $3
+}
+END{
+
+	for(s=1;s<=10;s++){
+		sp=0; delete toins; delete st
+		for(i=1;i<length(template);i++){
+			p = substr(template,i,2)
+			for(k in pair){
+				if(pair[k]==p){
+					st[sp] = i
+					toins[sp++] = ins[k]
+					break
+				}
+			}
+		}
+		nt = ""
+		for(i=1;i<=length(template);i++){
+			nt = nt substr(template,i,1)
+			for(j in st) if(st[j]==i) nt = nt toins[j]
+		}
+		print length(nt)
+		template = nt
+	}
+	min = length(template)
+	max = 0
+	for(i=1;i<=length(template);i++){
+		c = substr(template,i,1)
+		count[c]++
+		if(count[c]>max){
+			max = count[c]
+			maxc = c
+		}
+	}
+	for(c in count){
+		if(count[c]<min){
+			min = count[c]
+			minc = c
+		}
+	}
+	print max, maxc, min, minc
+	print max-min
+}

14/14_2.awk

@@ -0,0 +1,44 @@
+BEGIN{ RS = "" }
+NR==1{
+	template = $0
+	RS ="\n"
+	next
+}
+{ ins[$1] = $3 }
+
+END{
+	# setup
+	for(i=1;i<length(template);i++){
+		p = substr(template,i,2)
+		paircount[p]++
+	}
+	# iterate
+	for(s=1;s<=40;s++){
+		delete newpaircount; delete countl; delete countr
+		for(p in paircount){
+			n = paircount[p]
+			c1 = substr(p,1,1)
+			c2 = substr(p,2,1)
+			toins = ins[p]
+#			print p, c1, toins, c2, n
+			newpaircount[c1 toins]+=n
+			newpaircount[toins c2]+=n
+			countl[c1]+=n
+			countr[toins]+=n
+			countl[toins]+=n
+			countr[c2]+=n
+		}
+		delete paircount
+		for(p in newpaircount) paircount[p] = newpaircount[p]
+
+		min = 999999999999
+		max = 0
+		for(c in countl){
+			count[c] = countl[c]>countr[c] ? countl[c] : countr[c]
+			if(count[c]>max) max=count[c]
+			if(count[c]<min) min=count[c]
+		}
+		if(s==10) print "part 1: ", max-min
+		if(s==40) print "part 2: ", max-min
+	}
+}

14/Makefile

@@ -0,0 +1,14 @@
+1t:
+	awk -f 14.awk test
+
+1i:
+	awk  -f 14.awk input
+
+2t:
+	awk  -f 14_2.awk test
+
+2i:
+	awk  -f 14_2.awk input
+
+paste:
+	xclip -sel c -o > test

README.md

@@ -27,6 +27,7 @@ awk -c -f 01.awk inputfile
 ```
       -------Part 1--------   -------Part 2--------
 Day       Time  Rank  Score       Time  Rank  Score
+ 14   00:27:53  4878      0   01:07:47  3311      0
  13   02:02:33  9507      0   02:19:53  9225      0 --- started late
  12   01:57:59  7241      0   02:16:49  6447      0
  11   00:46:21  4284      0   00:49:55  4145      0