Relocating

2018/day11/day11.go

@@ -0,0 +1,117 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+)
+
+const (
+	MaxInt = int(^uint(0) >> 1)
+	MinInt = -MaxInt - 1
+)
+
+var timeMachine *TimeMachine
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println("Usage: day11 <serial #>")
+		os.Exit(1)
+	}
+	timeMachine = &TimeMachine{
+		serial:     Atoi(os.Args[1]),
+		fuelLevels: make(map[string]int),
+	}
+
+	highest := MinInt
+	highestX, highestY := 0, 0
+	highestSize := 1
+	for size := 1; size <= 300; size++ {
+		fmt.Println(size)
+		for i := 0; i < 300-size; i++ {
+			for j := 0; j < 300-size; j++ {
+				w := timeMachine.findSquareFuelLevel(i, j, size)
+				if w > highest {
+					highestX, highestY = i, j
+					highest = w
+					highestSize = size
+				}
+			}
+		}
+	}
+	fmt.Print(highestX, ",", highestY, ",", highestSize, " : ", highest, "\n")
+}
+
+type TimeMachine struct {
+	serial     int
+	fuelLevels map[string]int
+}
+
+func (t *TimeMachine) getKeyForSquare(x, y, size int) string {
+	bx := strconv.Itoa(x)
+	by := strconv.Itoa(y)
+	bs := strconv.Itoa(size)
+	return bx + "," + by + "," + bs
+}
+
+func (t *TimeMachine) setSquareLevel(x, y, size, val int) {
+	t.fuelLevels[t.getKeyForSquare(x, y, size)] = val
+}
+
+func (t *TimeMachine) getSquareLevel(x, y, size int) int {
+	key := t.getKeyForSquare(x, y, size)
+	if ret, ok := t.fuelLevels[key]; !ok {
+		t.fuelLevels[key] = t.calcSquareLevel(x, y, size)
+		return t.fuelLevels[key]
+	} else {
+		return ret
+	}
+}
+
+func (t *TimeMachine) calcSquareLevel(x, y, size int) int {
+	if size == 1 {
+		return t.calcFuelLevel(x, y)
+	}
+	ret := t.getSquareLevel(x, y, size-1)
+	for wx := x; wx < wx+size; wx++ {
+		ret += t.getSquareLevel(wx, y+size-1, 1)
+	}
+	for wy := y; wy < wy+size-1; wy++ {
+		ret += t.getSquareLevel(x+size-1, wy, 1)
+	}
+	return ret
+}
+
+func (t *TimeMachine) calcFuelLevel(x, y int) int {
+	rackId := x + 10
+	startingLevel := rackId * y
+	currLevel := startingLevel + t.serial
+	currLevel *= rackId
+	var ret int
+	if currLevel < 100 {
+		ret = -5
+	} else {
+		ret = ((currLevel / 100) % 10) - 5
+	}
+	return ret
+}
+
+func (t *TimeMachine) findSquareFuelLevel(x, y, size int) int {
+	var ret int
+	for i := 0; i < size; i++ {
+		for j := 0; j < size; j++ {
+			ret += t.calcFuelLevel(i, j)
+		}
+	}
+	return ret
+}
+
+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
+}

2018/day11/myinput.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+./day11 5093

2018/day11/testinput.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+./day11 8