From d0588d654684a5a6d5dfec3b983cb4f41d057ca6 Mon Sep 17 00:00:00 2001
From: Piotr Russ <piotr.russ@betvictor.com>
Date: Thu, 10 Dec 2020 20:48:06 +0100
Subject: day9

---
 day9/day9-1.js | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 day9/day9-1.js

(limited to 'day9/day9-1.js')

diff --git a/day9/day9-1.js b/day9/day9-1.js
new file mode 100644
index 0000000..99ed680
--- /dev/null
+++ b/day9/day9-1.js
@@ -0,0 +1,24 @@
+const data = require('./data')
+const test = (d, i, nr) => {
+  if (i > nr) {
+    let sums = []
+    for (let a = i - nr - 1; a < i; a++) {
+      for (let b = i - nr - 1; b < i; b++) {
+        if (a !== b) {
+          sums.push(data[a]+data[b])
+        }
+      }
+    }
+    return sums.indexOf(data[i]) < 0
+  } else {
+    return false
+  }
+}
+
+const findNr = (nr) => (
+  data.find((d, i) => {
+    return test(d, i, nr)
+  })
+)
+
+console.log(findNr(25))
-- 
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