day16

1 files changed, 28 insertions, 0 deletions

diff --git a/day16/day16-1.js b/day16/day16-1.js
new file mode 100644
index 0000000..2968f35
--- /dev/null
+++ b/day16/day16-1.js
@@ -0,0 +1,28 @@
+const data = require('./data')
+const invalid = []
+const ranges = data
+  .split('\nyour ticket:')[0]
+  .split(/\n/g)
+  .filter(r => r)
+  .map(r => ({[r.split(': ')[0]]: r.split(': ')[1].split(' or ').map(s => s.split('-').map(a => parseInt(a)))}))
+  .reduce((c, n) => ({ ...c, ...n}), {})
+
+const your = data
+  .split('your ticket:\n')[1]
+  .split('nearby tickets:\n')[0]
+  .split(',')
+  .map(n => parseInt(n.replace(/\n/g,'')))
+
+const nearby = data
+  .split('nearby tickets:\n')[1]
+  .split(/\n/g)
+  .filter(n => n)
+  .map(n => n.split(',').map(nr => parseInt(nr)))
+  .filter(n => n.every(nr => {
+    const check = Object.values(ranges).some(r => r.some(ra => nr >= ra[0] && nr <= ra[1] ))
+    if (!check) { invalid.push(nr) }
+    return check
+  }))
+
+console.log('Answer: ', invalid.reduce((a, b) => a + b, 0))
+