From 468e261bccd8fc44ee6ffd3e7fda1c3659a7ab1d Mon Sep 17 00:00:00 2001
From: Piotr Russ <piotr.russ@betvictor.com>
Date: Thu, 10 Dec 2020 20:54:28 +0100
Subject: day10

---
 day10/day10-1.js | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 day10/day10-1.js

(limited to 'day10/day10-1.js')

diff --git a/day10/day10-1.js b/day10/day10-1.js
new file mode 100644
index 0000000..36363cc
--- /dev/null
+++ b/day10/day10-1.js
@@ -0,0 +1,19 @@
+const data = require('./data')
+let jolts = 0, diff1 = 0, diff3 = 1
+
+const next = () => {
+  const possible = data.filter(a => [jolts+1, jolts+2, jolts+3].indexOf(a) > -1)
+  return possible.length > 0 && Math.min.apply(Math, possible)
+}
+
+while (next()) {
+  if ((next() - jolts) === 1) {
+    diff1 += 1
+  } else if ((next() - jolts) === 3) {
+    diff3 += 1
+  }
+  jolts = next()
+}
+
+console.log(diff1*diff3)
+
-- 
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