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2023 day 08 properly

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This commit is contained in:
tristan 2023-12-09 15:51:37 +00:00
parent 9b5de2f13e
commit bfcad28fff
2 changed files with 8 additions and 18 deletions
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14
2023/08/part2/part2/part2.go
View file

@ -14,7 +14,7 @@ func StepsToSolveAll(ins string, net Network) (int, error) {
current := GetStarts(net)
res := 1
for _,start := range current {
_, steps, err := StepsToSolve(ins, net, start)
steps, err := StepsToSolve(ins, net, start)
if err != nil {
return 0, err
}
@ -43,10 +43,9 @@ func IsDone(state []string) bool {
return true
}
func StepsToSolve(ins string, net Network, start string) (int, int, error) {
func StepsToSolve(ins string, net Network, start string) (int, error) {
current := start
steps := 0;
history := []string{current}
for {
switch ins[steps % len(ins)] {
case 'L':
@ -54,15 +53,12 @@ func StepsToSolve(ins string, net Network, start string) (int, int, error) {
case 'R':
current = net[current][1]
default:
return 0, 0, fmt.Errorf("instructions unclear! Must only be 'R' and 'L', but got '%c' at [%v]", ins[steps], steps)
return 0, fmt.Errorf("instructions unclear! Must only be 'R' and 'L', but got '%c' at [%v]", ins[steps], steps)
}
steps ++
for step, state := range history {
if state == current && step == steps % len(ins) {
return step, steps-step, nil
}
if current[2] == goal {
return steps, nil
}
history = append(history, current)
}
}

12
2023/08/part2/part2/part2_test.go
View file

@ -55,18 +55,12 @@ func TestStepsToSolve(t *testing.T) {
"22Z": [2]string{"22B", "22B"},
"XXX": [2]string{"XXX", "XXX"},
}
start, steps, err := StepsToSolve("RL", net, "11B")
steps, err := StepsToSolve("LR", net, "11A")
equal(t, err, nil)
equal(t, start, 0)
equal(t, steps, 2)
start, steps, err = StepsToSolve("LR", net, "11A")
steps, err = StepsToSolve("LR", net, "22A")
equal(t, err, nil)
equal(t, start, 1)
equal(t, steps, 2)
start, steps, err = StepsToSolve("LR", net, "22A")
equal(t, err, nil)
equal(t, start, 1)
equal(t, steps, 6)
equal(t, steps, 3)
}
func TestLCM(t *testing.T) {