From 358a69b13e6c7ccae5218ff7e871b5d68ea07a79 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Thu, 24 Dec 2020 13:27:18 +0100
Subject: Christmas special

---
 2020/24/solve.js | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

(limited to '2020/24/solve.js')

diff --git a/2020/24/solve.js b/2020/24/solve.js
index dca0e75..5b981fa 100644
--- a/2020/24/solve.js
+++ b/2020/24/solve.js
@@ -2,12 +2,23 @@ const { _, performance } = require("perf_hooks");
 const fs = require("fs");
 const I = fs.readFileSync("input", "utf8").split("\n");
 
-M={e:[0,1,-1],w:[0,-1,1],se:[1,0,-1],nw:[-1,0,1],ne:[-1,1,0],sw:[1,-1,0]};
-N=t=>Object.values(M).map(m=>t.split(",").map(Number).map((c,i)=>c+m[i])).map((n)=>n.join(","))
-B=(t,b)=>N(t).filter(n=>b.has(n))
-W=(t,b)=>N(t).filter(n=>!b.has(n))
-n=b=>{w=new Set([...b].flatMap(t=>W(t, b)));o=new Set();for(t of b){r=B(t,b);if(r.length>0&&r.length<=2)o.add(t)}for(t of w){r=B(t,b);if(r.length==2)o.add(t)}return o}
-s=_=>{D=I.map(t=>{D=[];for(i=0;i<t.length;i++){s=t.substring(i,i+2);if(t[i]=="e")D.push("e");else if(t[i]=="w")D.push("w");else if(s=="se"){D.push("se");i++}else if(s=="nw"){D.push("nw");i++}else if(s=="ne"){D.push("ne");i++}else if(s=="sw"){D.push("sw");i++}}return D});b=new Set();for(t of D){p=[0,0,0];for(d of t)for(i=0;i<3;i++)p[i]+=M[d][i];k=p.join(",");if(b.has(k))b.delete(k);else b.add(k)}console.log(b.size);for(i=0;i<100;i++)b=n(b);return b.size}
+// The tree looked better in my imagination
+
+M={e:[0,1,-1],w:[0,-1,1],se:[1,0,-/**/1],nw:[-1,0,1],ne:[-1,1,0],sw:[1,-1,0]};N
+=t=>Object.values(M).map(m=>t./*O*$***O**/split(",").map(Number).map((c,i)=>c+m
+[i])).map((n)=>n.join(",")/****#****O********/);B=(t,b)=>N(t).filter(n=>b.has(n
+));W=(t,b)=>N(t).filter/*****O*****#****O********/(n=>!b.has(n));n=b=>{w=new///
+Set([...b].flatMap/**$***O******$O*********O****#****/(t=>W(t, b)));o=new Set()
+for(t of b){r=/*****O*******#**********O************O*****/B(t,b);if(r.length>0
+&&r.length/******O*************O*****#**********O****$***O****/<=2)o.add(t)}for
+(t of /****#***$****O*******O************$****O**************O****/w){r=B(t,b);
+if(r.length==2)o.add(t)}return/*|||||*/o};s=_=>{D=I.map(t=>{D=[];for(i=0;i<t.//
+length;i++){s=t.substring(i,i+/*|||||*/2);if(t[i]=="e")D.push("e");else if(t[i]
+=="w")D.push("w");else if(s===/*|||||*/"se"){D.push("se");i++}else if(s=="nw"){
+D.push("nw");i++}else if(s=="ne"){D.push("ne");i++}else if(s=="sw"){D.push("sw"
+);i++}}return D});b=new Set();for(t of D){p=[0,0,0];for(d of t)for(i=0;i<3;i++)
+p[i]+=M[d][i];k=p.join(",");if(b.has(k))b.delete(k);else b.add(k)}console.log(b
+.size);for(i=0;i<100;i++)b=n(b);return b.size}/////////////////////////////////
 
 const tic = performance.now();
 console.log(s());
-- 
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