da/adventofcode
Archived
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

3rd: optimize embarassing binary to decimal conversion

Browse Source
This commit is contained in:
da
2021-12-04 02:57:46 +01:00
parent 69bcb419ed
commit a7474d703c
1 changed files with 7 additions and 83 deletions
Download Patch File Download Diff File Expand all files Collapse all files
pkg/three/three.go
+7 -83
View File
@@ -13,7 +13,7 @@ func Run() {
values := readInput() values := readInput()
heatmap := createHeatmap(values) heatmap := createHeatmap(values)
fmt.Printf("power: %d\n", calcPower(calcGamma(heatmap, len(values)), calcEpsilon(heatmap, len(values)))) fmt.Printf("power: %d\n", calcPower(calcGamma(heatmap, len(values)), calcEpsilon(heatmap, len(values))))
fmt.Printf("oxygen * co2: %d\n", calcOxygen(values)*calcCO2(values)) fmt.Printf("oxygen * co2 (life support): %d\n", calcOxygen(values)*calcCO2(values))
} }
func calcOxygen(values [][]int) int { func calcOxygen(values [][]int) int {
@@ -116,89 +116,13 @@ func calcPower(gamma []int, epsilon []int) int {
return convertToDecimal(gamma) * convertToDecimal(epsilon) return convertToDecimal(gamma) * convertToDecimal(epsilon)
} }
func convertToDecimal(gamma []int) int { func convertToDecimal(i []int) int {
gammaDecimalValue := 0 s := []string{}
for k, v := range gamma { for _, v := range i {
switch k { s = append(s, strconv.Itoa(v))
case 0:
if v == 1 {
gammaDecimalValue += 2048
} }
case 1: r, _ := strconv.ParseInt(strings.Join(s, ""), 2, 64)
if v == 1 { return int(r)
gammaDecimalValue += 1024
}
case 2:
if v == 1 {
gammaDecimalValue += 512
}
case 3:
if v == 1 {
gammaDecimalValue += 256
}
case 4:
if v == 1 {
gammaDecimalValue += 128
}
case 5:
if v == 1 {
gammaDecimalValue += 64
}
case 6:
if v == 1 {
gammaDecimalValue += 32
}
case 7:
if v == 1 {
gammaDecimalValue += 16
}
case 8:
if v == 1 {
gammaDecimalValue += 8
}
case 9:
if v == 1 {
gammaDecimalValue += 4
}
case 10:
if v == 1 {
gammaDecimalValue += 2
}
case 11:
if v == 1 {
gammaDecimalValue++
}
}
}
return gammaDecimalValue
}
func convertToDecimal5(gamma []int) int {
gammaDecimalValue := 0
for k, v := range gamma {
switch k {
case 0:
if v == 1 {
gammaDecimalValue += 16
}
case 1:
if v == 1 {
gammaDecimalValue += 8
}
case 2:
if v == 1 {
gammaDecimalValue += 4
}
case 3:
if v == 1 {
gammaDecimalValue += 2
}
case 4:
if v == 1 {
gammaDecimalValue++
}
}
}
return gammaDecimalValue
} }
func calcGamma(heatmap []int, lines int) []int { func calcGamma(heatmap []int, lines int) []int {