2017 Day 18 Complete!

2017/day18/day18.go

@@ -0,0 +1,150 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"strconv"
+	"bufio"
+	"os"
+	//"time"
+)
+
+var sendCount [2]int
+var chanCount [2]int
+func main() {
+	inp := StdinToStrings()
+	// Part 2
+	progAChan := make(chan int, 100000)
+	progBChan := make(chan int, 100000)
+	go run(inp, 0, progAChan, progBChan)
+	run(inp, 1, progBChan, progAChan)
+	// Part 1
+	//runPart1(inp)
+}
+
+var reg [2]map[string]int
+
+func run(inp []string, pId int, input, output chan int) {
+	reg[pId] = make(map[string]int)
+	// Default register p to the process id
+	reg[pId]["p"] = pId
+
+	for i := 0; i >= 0 && i < len(inp); i++ {
+		fmt.Println(pId, ":", inp[i])
+		pts := strings.Split(inp[i], " ")
+		switch(pts[0]) {
+		case "snd": send(pId, pts[1], output)
+		case "set": setReg(pId, pts[1], pts[2])
+		case "add": addReg(pId, pts[1], pts[2])
+		case "mul": mulReg(pId, pts[1], pts[2])
+		case "mod": modReg(pId, pts[1], pts[2])
+		case "rcv": receive(pId, pts[1], input)
+		case "jgz": i += jumpIfPos(pId, pts[1], pts[2])
+		}
+	}
+	close(output)
+}
+
+func send(pId int, key string, out chan int) {
+	sendCount[pId]++
+	if pId == 0 {
+		chanCount[1]++
+	} else {
+		chanCount[0]++
+	}
+	out <- getValue(pId, key)
+}
+
+func receive(pId int, key string, in chan int) {
+	fmt.Println("SENDS:",sendCount)
+	reg[pId][key] = <-in
+	chanCount[pId]--
+}
+
+/* Part 1 Specifics */
+var lastSound int
+func runPart1(inp []string) {
+	reg[0] = make(map[string]int)
+	printRegisters(0)
+	for i := 0; i >= 0 && i < len(inp); i++ {
+		pts := strings.Split(inp[i], " ")
+		switch(pts[0]) {
+		case "snd": playSound(0, pts[1])
+		case "set": setReg(0, pts[1], pts[2])
+		case "add": addReg(0, pts[1], pts[2])
+		case "mul": mulReg(0, pts[1], pts[2])
+		case "mod": modReg(0, pts[1], pts[2])
+		case "rcv": recoverSound(0, pts[1])
+		case "jgz": i += jumpIfPos(0, pts[1], pts[2])
+		}
+	}
+}
+
+func playSound(pId int, freq string) {
+	lastSound = getValue(pId, freq)
+	fmt.Println("*BEEP* (",lastSound,")")
+}
+
+func recoverSound(pId int, test string) {
+	if getValue(pId, test) != 0 {
+		playSound(pId, fmt.Sprint(lastSound))
+		os.Exit(0)
+	}
+}
+
+func setReg(pId int, key string, val string) {
+	reg[pId][key] = getValue(pId, val)
+}
+
+func addReg(pId int, key string, val string) {
+	reg[pId][key] = getValue(pId, key) + getValue(pId, val)
+}
+
+func mulReg(pId int, key string, val string) {
+	reg[pId][key] = getValue(pId, key) * getValue(pId, val)
+}
+
+func modReg(pId int, key string, val string) {
+	reg[pId][key] = getValue(pId, key) % getValue(pId, val)
+}
+
+func jumpIfPos(pId int, test string, jump string) int {
+	var ret int
+	if getValue(pId, test) > 0 {
+		ret = getValue(pId, jump) - 1
+	}
+	return ret
+}
+
+func getValue(pId int, key string) int {
+	var ret int
+	var ok bool
+	var err error
+	if ret, err = strconv.Atoi(key); err != nil {
+		// It's not a number
+		if ret, ok = reg[pId][key]; !ok {
+			// The register is empty
+			reg[pId][key] = 0
+			ret = 0
+		}
+	}
+	return ret
+}
+
+func printRegisters(pId int) {
+	fmt.Print(pId,": [ ")
+	for i := 0; i < 26; i++ {
+		getReg := string('a'+i)
+		fmt.Printf("%s:%d ", getReg, getValue(pId, getReg))
+	}
+	fmt.Print("]\n")
+}
+
+func StdinToStrings() []string {
+	var input []string
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		input = append(input, scanner.Text())
+	}
+	return input
+}

2017/day18/input

@@ -0,0 +1,41 @@
+set i 31
+set a 1
+mul p 17
+jgz p p
+mul a 2
+add i -1
+jgz i -2
+add a -1
+set i 127
+set p 464
+mul p 8505
+mod p a
+mul p 129749
+add p 12345
+mod p a
+set b p
+mod b 10000
+snd b
+add i -1
+jgz i -9
+jgz a 3
+rcv b
+jgz b -1
+set f 0
+set i 126
+rcv a
+rcv b
+set p a
+mul p -1
+add p b
+jgz p 4
+snd a
+set a b
+jgz 1 3
+snd b
+set f 1
+add i -1
+jgz i -11
+snd a
+jgz f -16
+jgz a -19

2017/day18/testinput

@@ -0,0 +1,10 @@
+set a 1
+add a 2
+mul a a
+mod a 5
+snd a
+set a 0
+rcv a
+jgz a -1
+set a 1
+jgz a -2

2017/day18/testinput2

@@ -0,0 +1,7 @@
+snd 1
+snd 2
+snd p
+rcv a
+rcv b
+rcv c
+rcv d