day 6 and 7

2019/07/part1.js

@@ -0,0 +1,91 @@
+const fs = require("fs");
+const text = fs.readFileSync("2019/07/input.txt", "utf-8");
+  
+let memory = text.split(',').map(opcode => parseInt(opcode));
+
+function valueOf(index, paramMode) {
+	return paramMode == "0" ? memory[memory[index]] : memory[index];
+}
+
+function fiveDig(value) {
+	return value.toString().length < 5 ? fiveDig("0" + value) : value.toString();
+}
+
+function run(phase, input) {
+	let inputSequence = [phase, input];
+	let inputNo = 0;
+	let outputSequence = []
+	let i = 0;
+	while (true) {
+		instruction = fiveDig(memory[i]);
+		opcode = instruction.slice(3);
+		if (opcode == '01') {
+			memory[memory[i+3]] = valueOf(i+1, instruction[2]) + valueOf(i+2, instruction[1]);
+			i+=4;
+		} else if (opcode == '02') {
+			memory[memory[i+3]] = valueOf(i+1, instruction[2]) * valueOf(i+2, instruction[1]);
+			i+=4;
+		} else if (opcode == '03') {
+			userInput = inputSequence[inputNo % inputSequence.length];
+			inputNo++;
+			// console.log("IN "+userInput);
+			memory[memory[i+1]] = userInput;
+			i+=2;
+		} else if (opcode == '04') {
+			outputValue = valueOf(i+1, instruction[2])
+			// console.log("OUT "+outputValue);
+			outputSequence.push(outputValue);
+			i+=2;
+		} else if (opcode == '05') {
+			if (valueOf(i+1, instruction[2]) != 0) {
+				i = valueOf(i+2, instruction[1])
+			} else {
+				i+=3;
+			}
+		} else if (opcode == '06') {
+			if (valueOf(i+1, instruction[2]) == 0) {
+				i = valueOf(i+2, instruction[1])
+			} else {
+				i+=3;
+			}
+		} else if (opcode == '07') {
+			memory[memory[i+3]] = valueOf(i+1, instruction[2]) < valueOf(i+2, instruction[1]) ? 1 : 0;
+			i+=4;
+		} else if (opcode == '08') {
+			memory[memory[i+3]] = valueOf(i+1, instruction[2]) == valueOf(i+2, instruction[1]) ? 1 : 0;
+			i+=4;
+		} else if (opcode == '99') {
+			// console.log("HLT")
+			return outputSequence;
+		}
+	}
+}
+
+function test(phaseSequence) {
+	let output = [0]
+	phaseSequence.forEach(phase => {
+		output = run(phase, output[0]);
+	})
+	return output[0];
+}
+
+function arrayIsUnique(myArray) {
+	return myArray.length === new Set(myArray).size;
+}
+
+maxSignal = 0;
+// inefficient af but idk how else to do it
+for (let phase = 0; phase < Math.pow(5, 5); phase++){
+	phaseSequence = [phase % 5, Math.floor(phase/5)%5, Math.floor(phase/25)%5, Math.floor(phase/125)%5, Math.floor(phase/625)%5]
+	if (!arrayIsUnique(phaseSequence)) {
+		continue;
+	}
+	if (phaseSequence == [1, 0, 4, 3, 2]) {
+		console.log(phaseSequence);
+	}
+	thrustSignal = test(phaseSequence);
+	if (maxSignal < thrustSignal) {
+		maxSignal = thrustSignal;
+	}
+}
+console.log(maxSignal);