2019 Day 02 Complete

2019/day02/1202input

@@ -0,0 +1 @@
+1,12,2,3,1,1,2,3,1,3,4,3,1,5,0,3,2,13,1,19,1,10,19,23,1,23,9,27,1,5,27,31,2,31,13,35,1,35,5,39,1,39,5,43,2,13,43,47,2,47,10,51,1,51,6,55,2,55,9,59,1,59,5,63,1,63,13,67,2,67,6,71,1,71,5,75,1,75,5,79,1,79,9,83,1,10,83,87,1,87,10,91,1,91,9,95,1,10,95,99,1,10,99,103,2,103,10,107,1,107,9,111,2,6,111,115,1,5,115,119,2,119,13,123,1,6,123,127,2,9,127,131,1,131,5,135,1,135,13,139,1,139,10,143,1,2,143,147,1,147,10,0,99,2,0,14,0

2019/day02/input

@@ -0,0 +1 @@
+1,0,0,3,1,1,2,3,1,3,4,3,1,5,0,3,2,13,1,19,1,10,19,23,1,23,9,27,1,5,27,31,2,31,13,35,1,35,5,39,1,39,5,43,2,13,43,47,2,47,10,51,1,51,6,55,2,55,9,59,1,59,5,63,1,63,13,67,2,67,6,71,1,71,5,75,1,75,5,79,1,79,9,83,1,10,83,87,1,87,10,91,1,91,9,95,1,10,95,99,1,10,99,103,2,103,10,107,1,107,9,111,2,6,111,115,1,5,115,119,2,119,13,123,1,6,123,127,2,9,127,131,1,131,5,135,1,135,13,139,1,139,10,143,1,2,143,147,1,147,10,0,99,2,0,14,0

2019/day02/main.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	inp := StdinToString()
+	f := func(c rune) bool {
+		return c == ','
+	}
+	var prog []int
+	for _, v := range strings.FieldsFunc(inp, f) {
+		prog = append(prog, Atoi(v))
+	}
+	//part1(prog)
+	part2(prog)
+}
+
+func part1(prog []int) {
+	for i := 0; i < len(prog); i += 4 {
+		switch prog[i] {
+		case 1:
+			prog[prog[i+3]] = add(prog[i+1], prog[i+2], prog)
+		case 2:
+			prog[prog[i+3]] = mult(prog[i+1], prog[i+2], prog)
+		case 99:
+			printState(prog)
+			os.Exit(0)
+		}
+	}
+}
+
+func part2(prog []int) {
+	for n := 0; n <= 99; n++ {
+		for v := 0; v <= 99; v++ {
+			progcpy := make([]int, len(prog))
+			copy(progcpy, prog)
+			progcpy[1], progcpy[2] = n, v
+			for i := 0; i < len(progcpy); i += 4 {
+				switch prog[i] {
+				case 1:
+					progcpy[progcpy[i+3]] = add(progcpy[i+1], progcpy[i+2], progcpy)
+				case 2:
+					progcpy[progcpy[i+3]] = mult(progcpy[i+1], progcpy[i+2], progcpy)
+				case 99:
+					if progcpy[0] == 19690720 {
+						fmt.Println("Found value:", n, v)
+						fmt.Println("Answer:", (100*n + v))
+						os.Exit(0)
+					}
+					i = len(progcpy)
+				}
+			}
+		}
+	}
+}
+
+func printState(prog []int) {
+	fmt.Println(prog)
+}
+
+func add(i, j int, prog []int) int {
+	return prog[i] + prog[j]
+}
+
+func mult(i, j int, prog []int) int {
+	return prog[i] * prog[j]
+}
+
+func StdinToString() string {
+	var input string
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		input += scanner.Text()
+	}
+	return input
+}
+
+func Atoi(i string) int {
+	var ret int
+	var err error
+	if ret, err = strconv.Atoi(i); err != nil {
+		log.Fatal("Invalid Atoi")
+	}
+	return ret
+}

2019/day02/testinput1

@@ -0,0 +1 @@
+1,9,10,3,2,3,11,0,99,30,40,50

2019/day02/testinput2

@@ -0,0 +1 @@
+1,0,0,0,99

2019/day02/testinput3

@@ -0,0 +1 @@
+2,3,0,3,99

2019/day02/testinput4

@@ -0,0 +1 @@
+2,4,4,5,99,0

2019/day02/testinput5

@@ -0,0 +1 @@
+1,1,1,4,99,5,6,0,99