day 4

2022/4.js

@@ -0,0 +1,27 @@
+const fs = require('fs');
+
+const rangeCheck = (a, b) => (a[0] <= b[0] && a[1] >= b[1])
+                           ||(b[0] <= a[0] && b[1] >= a[1]);
+
+const pairs = fs.readFileSync('4.input')
+                        .toString()
+                        .split('\n')
+                        .map(i => i.split(',')
+                        .map(j => j.split('-')
+                        .map(k => parseInt(k))));
+
+const overlapingPairs = pairs.reduce((p, c) => {
+    if(rangeCheck(c[0], c[1])) p++;
+    return p;
+}, 0);
+
+console.log(`Part 1: ${overlapingPairs}`);
+
+const overlapCheck = (a, b) => a[0] <= b[1] && b[0] <= a[1];
+
+const anyOverlapingPairs = pairs.reduce((p, c) => {
+    if(overlapCheck(c[0], c[1])) p++;
+    return p;
+}, 0);
+
+console.log(`Part 2: ${anyOverlapingPairs}`);