2018 d1 p2

2018/1/input.txt

@@ -956,5 +956,4 @@
 -3
 -18
 -7
-+127054
++127054
-

2018/1/part2.js

@@ -0,0 +1,21 @@
+const fs = require('fs');
+
+let input = fs.readFileSync('input.txt', 'utf-8');
+let freq = 0;
+let history = [0];
+found = false;
+while (!found) {
+	for (let line of input.split('\n')) {
+		num = parseInt(line);
+		if (num) {
+			freq += num;
+		}
+		if (history.includes(freq)) {
+			found = true;
+			break;
+		} else {
+			history.push(freq);
+		}
+	}
+}
+console.log(freq)