From dc2182e0d1fc2d0ca712a3acfefde568f5cf1869 Mon Sep 17 00:00:00 2001
From: sejo <sejo@texto-plano.xyz>
Date: Tue, 21 Dec 2021 01:25:43 -0600
Subject: [PATCH] progress on day 21, pt 2

---
 21/21_2.awk | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 21/Makefile |  14 +++++
 2 files changed, 160 insertions(+)
 create mode 100644 21/21_2.awk
 create mode 100644 21/Makefile

diff --git a/21/21_2.awk b/21/21_2.awk
new file mode 100644
index 0000000..b0364e1
--- /dev/null
+++ b/21/21_2.awk
@@ -0,0 +1,146 @@
+{
+ pos[$2] = $5
+}
+END{
+	for(i=0;i<27;i++){
+		n2 = int(i/9)
+		n1 = int( (i%9)/3 )
+		n0 = int( (i%9)%3 )
+		sum = n2+n1+n0+3
+		c[sum]++
+		print n2+1, n1+1, n0+1, "=", sum
+	}
+	print "roll result : amount of times /27"
+	for(sum in c){
+		print sum,":",c[sum]
+	}
+
+	for(turn=1;turn<=2;turn++){
+		print "starting with",pos[turn]
+		for(i=3;i<=9;i++){
+			p=pos[turn]; sc=0
+			print "incrementing",i
+			for(j=1;j<=15;j++){
+				p = 1 + (p-1+i)%10
+				sc+=p
+				printf "%d ", p
+				if(sc>=21) break
+			}
+			printf ": %d in %d",sc, j
+			print ""
+		}
+		print "----"
+	}
+	expn = 6
+	maxwonturns=0
+	for(i=0;i<7^expn;i++){
+		r = i
+		for(e=0;e<expn;e++){
+			n[e] = int((r%(7^(e+1)))/7^e)
+			r -= n[e]
+		}
+		printf "running %d: ",i
+		for(e=expn-1;e>=0;e--){
+			n[e] += 3
+			printf "%d ",n[e]
+		}
+		print ""
+
+		p1 = pos[1]; p2 = pos[2]
+		s1 = 0; s2 = 0;
+		nu = 0;
+		swon = 0
+		for(j=expn-1;j>=0;j--){
+			p1 = 1 + (p1-1+n[j])%10
+			s1 += p1
+			p2 = 1 + (p2-1+n[j])%10
+			s2 += p2
+			nu  += c[ n[j] ]
+			print p1,s1, p2,s2
+			if(s1>=21){
+				print "p1 won", s1, nu, expn-j
+				won[1]++;
+				wonu[1] += nu
+				swon = 1
+				break
+			}
+			if(s2>=21){
+				print "p2 won", s2, nu, expn-j
+				wonu[2] += nu
+				won[2]++
+				swon = 1
+				break
+			}
+		}
+		if(!swon){
+			print "no one won"
+			break
+		} else{
+			if(maxwonturns<expn-j) maxwonturns=expn-j
+		}
+	}
+	print won[1], won[2], won[1]+won[2], 7^expn
+	print wonu[1], wonu[2]
+	print maxwonturns
+
+	exit
+
+	turn = 1
+	roll= 1
+	rollcount = 0
+	do{
+		r=0
+		for(i=1;i<=3;i++){
+			r += roll
+			roll = roll%100 + 1
+			rollcount++
+		}
+		pos[turn] = 1+(pos[turn]-1+r)%10
+		score[turn] += pos[turn]
+#		print roll,turn, pos[turn],score[turn]
+		turn = (turn==1) ? 2 : 1
+	}while(score[1]<21 && score[2]<21)
+
+	print rollcount, score[1], score[2]
+
+}
+
+#roll result : amount of times /27
+#3 : 1
+#4 : 3
+#5 : 6
+#6 : 7
+#7 : 6
+#8 : 3
+#9 : 1
+
+
+# 1 1 1 = 3
+# 1 1 2 = 4
+# 1 1 3 = 5
+# 1 2 1 = 4
+# 1 2 2 = 5
+# 1 2 3 = 6
+# 1 3 1 = 5
+# 1 3 2 = 6
+# 1 3 3 = 7
+
+# 2 1 1
+# 2 1 2
+# 2 1 3
+# 2 2 1
+# 2 2 2
+# 2 2 3
+# 2 3 1
+# 2 3 2
+# 2 3 3
+
+# 3 1 1
+# 3 1 2
+# 3 1 3
+# 3 2 1
+# 3 2 2
+# 3 2 3
+# 3 3 1
+# 3 3 2
+# 3 3 3
diff --git a/21/Makefile b/21/Makefile
new file mode 100644
index 0000000..126e02e
--- /dev/null
+++ b/21/Makefile
@@ -0,0 +1,14 @@
+1t:
+	awk -f 21.awk test
+
+1i:
+	awk  -f 21.awk input
+
+2t:
+	awk  -f 21_2.awk test
+
+2i:
+	awk  -f 21_2.awk input
+
+paste:
+	xclip -sel c -o > test