renamed 2 digit file names

2018/09/part1.js

@@ -0,0 +1,27 @@
+// input
+let players = 465;
+let last = 71498;
+
+// part 1 : short and extreemly inefficient.
+console.time('speed');
+
+let circle = [0];
+let pointer = 0;
+let elves = [];
+elves.length = players;
+elves.fill(0);
+for (let i = 1; i < last; i++) {
+	if (i % 23 == 0) {
+		let index = pointer - 7 + (pointer - 7 < 0 ? circle.length : 0);
+		elves[i % players] += i + circle[index];
+		circle.splice(index, 1);
+		pointer = index;
+	} else {
+		circle.splice(pointer + 2 - (pointer + 2 > circle.length ? circle.length : 0), 0, i);
+		pointer = circle.indexOf(i);
+	}
+	// console.log(circle.join());
+}
+console.log(Math.max.apply(null, elves));
+
+console.timeEnd('speed');