Day15
This commit is contained in:
Karl Spickermann
parent
f2e83bc7d2
commit
1cccb7132d
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@ -11,10 +11,9 @@
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</component>
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<component name="ChangeListManager">
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<list default="true" id="400bdf61-8921-41d3-8f98-a0a1b0877f46" name="Default Changelist" comment="">
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<change afterPath="$PROJECT_DIR$/day14/day14.go" afterDir="false" />
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<change afterPath="$PROJECT_DIR$/day14/day14Test.txt" afterDir="false" />
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<change afterPath="$PROJECT_DIR$/day14/day14Test2.txt" afterDir="false" />
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<change afterPath="$PROJECT_DIR$/day15/day15.go" afterDir="false" />
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<change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
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<change beforePath="$PROJECT_DIR$/helper/helper.go" beforeDir="false" afterPath="$PROJECT_DIR$/helper/helper.go" afterDir="false" />
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</list>
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<option name="SHOW_DIALOG" value="false" />
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<option name="HIGHLIGHT_CONFLICTS" value="true" />
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@ -55,7 +54,7 @@
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<recent name="C:\Users\karls\go\src\AoC2020" />
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</key>
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</component>
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<component name="RunManager" selected="Go Build.go build day14.go">
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<component name="RunManager" selected="Go Build.go build day15.go">
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<configuration name="go build day10.go" type="GoApplicationRunConfiguration" factoryName="Go Application" nameIsGenerated="true">
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<module name="AoC2020" />
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<working_directory value="$PROJECT_DIR$/day10" />
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@ -106,6 +105,15 @@
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<directory value="$PROJECT_DIR$" />
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<method v="2" />
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</configuration>
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<configuration name="go build day15.go" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
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<module name="AoC2020" />
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<working_directory value="$PROJECT_DIR$" />
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<kind value="FILE" />
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<filePath value="$PROJECT_DIR$/day15/day15.go" />
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<package value="AoC2020" />
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<directory value="$PROJECT_DIR$" />
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<method v="2" />
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</configuration>
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<configuration name="go build day1.go" type="GoApplicationRunConfiguration" factoryName="Go Application" nameIsGenerated="true">
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<module name="AoC2020" />
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<working_directory value="$PROJECT_DIR$/day1" />
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@ -224,9 +232,11 @@
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<item itemvalue="Go Build.go build day12.go" />
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<item itemvalue="Go Build.go build day13.go" />
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<item itemvalue="Go Build.go build day14.go" />
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<item itemvalue="Go Build.go build day15.go" />
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</list>
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<recent_temporary>
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<list>
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<item itemvalue="Go Build.go build day15.go" />
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<item itemvalue="Go Build.go build day1.go" />
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</list>
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</recent_temporary>
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@ -261,26 +271,26 @@
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<screen x="0" y="0" width="1920" height="1040" />
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</state>
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<state x="739" y="287" key="FileChooserDialogImpl/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1607278759015" />
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<state width="1877" height="386" key="GridCell.Tab.0.bottom" timestamp="1607962571043">
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<state width="1877" height="386" key="GridCell.Tab.0.bottom" timestamp="1608046616194">
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<screen x="0" y="0" width="1920" height="1040" />
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</state>
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<state width="1877" height="386" key="GridCell.Tab.0.bottom/-1920.0.1920.1040/0.0.1920.1040@-1920.0.1920.1040" timestamp="1607708629475" />
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<state width="1877" height="386" key="GridCell.Tab.0.bottom/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1607962571043" />
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<state width="1877" height="386" key="GridCell.Tab.0.center" timestamp="1607962571042">
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<state width="1877" height="386" key="GridCell.Tab.0.bottom/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1608046616194" />
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<state width="1877" height="386" key="GridCell.Tab.0.center" timestamp="1608046616194">
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<screen x="0" y="0" width="1920" height="1040" />
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</state>
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<state width="1877" height="386" key="GridCell.Tab.0.center/-1920.0.1920.1040/0.0.1920.1040@-1920.0.1920.1040" timestamp="1607708629474" />
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<state width="1877" height="386" key="GridCell.Tab.0.center/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1607962571042" />
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<state width="1877" height="386" key="GridCell.Tab.0.left" timestamp="1607962571042">
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<state width="1877" height="386" key="GridCell.Tab.0.center/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1608046616194" />
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<state width="1877" height="386" key="GridCell.Tab.0.left" timestamp="1608046616194">
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<screen x="0" y="0" width="1920" height="1040" />
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</state>
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<state width="1877" height="386" key="GridCell.Tab.0.left/-1920.0.1920.1040/0.0.1920.1040@-1920.0.1920.1040" timestamp="1607708629474" />
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<state width="1877" height="386" key="GridCell.Tab.0.left/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1607962571042" />
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<state width="1877" height="386" key="GridCell.Tab.0.right" timestamp="1607962571042">
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<state width="1877" height="386" key="GridCell.Tab.0.left/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1608046616194" />
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<state width="1877" height="386" key="GridCell.Tab.0.right" timestamp="1608046616194">
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<screen x="0" y="0" width="1920" height="1040" />
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</state>
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<state width="1877" height="386" key="GridCell.Tab.0.right/-1920.0.1920.1040/0.0.1920.1040@-1920.0.1920.1040" timestamp="1607708629475" />
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<state width="1877" height="386" key="GridCell.Tab.0.right/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1607962571042" />
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<state width="1877" height="386" key="GridCell.Tab.0.right/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1608046616194" />
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<state x="782" y="240" key="RollbackChangesDialog" timestamp="1607174263188">
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<screen x="0" y="0" width="1920" height="1040" />
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</state>
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@ -301,9 +311,9 @@
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<screen x="0" y="0" width="1920" height="1040" />
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</state>
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<state x="593" y="141" width="585" height="801" key="find.popup/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1607700424475" />
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<state x="623" y="225" width="672" height="678" key="search.everywhere.popup" timestamp="1607081728725">
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<state x="623" y="225" width="672" height="678" key="search.everywhere.popup" timestamp="1608045273455">
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<screen x="0" y="0" width="1920" height="1040" />
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</state>
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<state x="623" y="225" width="672" height="678" key="search.everywhere.popup/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1607081728725" />
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<state x="623" y="225" width="672" height="678" key="search.everywhere.popup/-1920.0.1920.1040/0.0.1920.1040@0.0.1920.1040" timestamp="1608045273455" />
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</component>
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</project>
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@ -0,0 +1,59 @@
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package main
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import "fmt"
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func main() {
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fmt.Println(run([]int{5,1,9,18,13,8,0}, 2020))
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fmt.Println(runPart2([]int{5,1,9,18,13,8,0}, 30000000))
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}
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func run(startingNumber []int, length int) int{
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var band []int
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band = append(band, startingNumber...)
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for i := len(startingNumber); i < length; i++ {
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currentNumber := band[i-1]
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index := findIndex(currentNumber,band)
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if index == -1 {
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band = append(band, 0)
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}else {
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band = append(band, i-1-index)
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}
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}
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return band[len(band)-1]
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}
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func runPart2(startingNumber []int, length int) int{
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var band = make (map[int][]int)
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for i, val := range startingNumber {
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band[val] = []int{i,i}
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}
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lastNumber := startingNumber[len(startingNumber)-1]
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for i := len(startingNumber); i < length; i++ {
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currentNumber := lastNumber
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indexes := band[currentNumber]
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diffIndexes := indexes[1]-indexes[0]
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if diffIndexes == 0 {
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lastNumber = 0
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band[0] = []int{band[0][1],i}
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}else {
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lastNumber = diffIndexes
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if len(band[diffIndexes]) != 0 {
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band[diffIndexes] = []int{band[diffIndexes][1],i}
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}else {
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band[diffIndexes] = []int{i,i}
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}
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}
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}
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return lastNumber
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}
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func findIndex(number int, band []int) int{
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for i := len(band)-2; i >= 0; i-- {
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if band[i] == number {
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return i
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}
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}
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return -1
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}
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@ -56,3 +56,12 @@ func FindAddendsForSum (possibleAddends []int, sum int) (int, int, error) {
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}
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return 0,0,errors.New("No fitting Addends found")
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}
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func SliceIndex(limit int, predicate func(i int) bool) int {
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for i := 0; i < limit; i++ {
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if predicate(i) {
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return i
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}
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}
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return -1
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}
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