Day 6 & 7

2024/05/index.ts

@@ -0,0 +1,38 @@
+const fs = require('fs');
+
+const input = fs.readFileSync(__dirname + '/input.txt', 'utf8');
+
+const rules: Array<[number, number]> = [];
+const updates: Array<Array<number>> = [];
+
+let rulesSection = true;
+input.split("\n").forEach((line: string) => {
+    if (!line) {
+        rulesSection = false;
+        return;
+    }
+    if (rulesSection) {
+        rules.push(line.split('|').map((s) => parseInt(s)) as [number, number]);
+    } else {
+        updates.push(line.split(',').map((s) => parseInt(s)));
+    }
+});
+
+let result = 0;
+
+updates.forEach((update) => {
+    for (let rule of rules) {
+        const minIndex = update.indexOf(rule[0]);
+        const maxIndex = update.indexOf(rule[1]);
+        if (
+            minIndex !== -1
+            && maxIndex !== -1
+            && minIndex > maxIndex
+        ) {
+            return;
+        }
+    }
+    result += update[(update.length - 1) / 2];
+});
+
+console.log(result);