aoc 1+2

www/statics/aoc/2019/02_solution-2.ts

@@ -0,0 +1,46 @@
+namespace AdventOfCode2019_02_2
+{
+	const DAY     = 2;
+	const PROBLEM = 2;
+
+	export async function run()
+	{
+		let input = await AdventOfCode.getInput(DAY);
+
+		let mem = input.split(",").map(p => parseInt(p));
+
+		for(let noun=0; noun<=99;noun++)
+		for(let verb=0; verb<=99;verb++)
+		{
+			if (exec(noun, verb, Object.assign([], mem)) == 19690720)
+			{
+				AdventOfCode.output(DAY, PROBLEM, (100*noun+verb).toString());
+				return;
+			}
+		}
+
+		AdventOfCode.output(DAY, PROBLEM, "error");
+	}
+
+	function exec(noun: number, verb: number, memory: number[])
+	{
+		let automata = memory;
+
+		automata[1] = noun;
+		automata[2] = verb;
+
+		for(let i=0; i < automata.length; i+=4)
+		{
+			const op   = automata[i+0];
+			const arg1 = automata[automata[i+1]];
+			const arg2 = automata[automata[i+2]];
+			const dest = automata[i+3];
+			
+			if (op==1) automata[dest] = arg1 + arg2;
+			else if (op==2) automata[dest] = arg1 * arg2;
+			else break;
+		}
+
+		return automata[0];
+	}
+}