day 7

day07/part1.js

@@ -0,0 +1,15 @@
+var lines = require("fs").readFileSync("input.txt").toString().split("\n").filter((a)=>(a));
+var top = lines[0].split(" ")[0];
+var oldtop = "";
+while(oldtop != top){
+	oldtop = top;
+	for(var line of lines){
+		console.log(line);
+		if(line.indexOf("->") != -1){
+			if(line.split(" -> ")[1].split(", ").indexOf(top) != -1){
+				top = line.split(" ")[0];
+			}
+		}
+	}
+}
+console.log(top);

day07/part2.js

@@ -0,0 +1,57 @@
+var lines = require("fs").readFileSync("input.txt").toString().split("\n").filter((a)=>(a));
+var top = lines[0].split(" ")[0];
+var oldtop = "";
+while(oldtop != top){
+	oldtop = top;
+	for(var line of lines){
+		if(line.indexOf("->") != -1){
+			if(line.split(" -> ")[1].split(", ").indexOf(top) != -1){
+				top = line.split(" ")[0];
+			}
+		}
+	}
+}
+//console.log(top);
+
+var discs = {};
+for(var line of lines){
+	var disc = {
+		weight: parseInt(new RegExp("\(([0-9]+)\)").exec(line)[0]),
+		subweight: 0,
+		children: []
+	}
+	if(line.indexOf("->") != -1){
+		disc.children = line.split(" -> ")[1].split(", ");
+	}
+	discs[line.split(" ")[0]] = disc;
+}
+
+function calcsubweight(id){
+	if(discs[id].children.length == 0){
+		return discs[id].weight;
+	}
+	else{
+		var childweight = -1;
+		discs[id].subweight += discs[id].weight;
+		for(var child of discs[id].children){
+			discs[child].subweight = calcsubweight(child);
+			discs[id].subweight += discs[child].subweight;
+			if(childweight != discs[child].subweight && childweight != -1){
+				console.log(id, child, childweight, discs[child].subweight);
+			}
+			childweight = discs[child].subweight;
+		}
+		return discs[id].subweight;
+	}
+}
+
+function debugPrint(id, i){
+console.log(i, id, discs[id]);
+	for(var child of discs[id].children){
+		debugPrint(child, i+1);
+	}
+}
+
+calcsubweight(top);
+debugPrint("wknuyhc", 0);
+//console.log(discs);