day20, small cleanup

day20/pulsePropagation.go

@@ -11,15 +11,15 @@ func Run() int {
 	// fmt.Println("hello from dya 20")
 
 	filename := "day20/input"
-	modules := ReadModules(filename)
-	InitStuffs(modules)
+	// modules := ReadModules(filename)
+	// InitStuffs(modules)
 	// log.Print("got modules:\n", modules)
 
 	// var low, high int
 	// low, high = Count10000ButtonPresses(modules)
 	// log.Printf("got low %d and high %d\n", low, high)
 
-	CheckSubgraphsStuff(modules)
+	CheckSubgraphsStuff(filename)
 
 	var result int
 	// result = CalcCommonStep()
@@ -27,25 +27,33 @@ func Run() int {
 	return result
 }
 
-func CheckSubgraphsStuff(allModules map[string]Module) {
+func CheckSubgraphsStuff(filename string) {
 	// loopStarts := allModules["broadcast"].Outputs()
 
 	// loop start and loop sink
 	loopItems := map[string]string {
-		// "sr": "xn",
-		// "ch": "xf",
-		// "hd": "qn",
+		"sr": "xn",
+		"ch": "xf",
+		"hd": "qn",
 		"bx": "zl",
 	}
 
 	for start, end := range loopItems {
+		allModules := ReadModules(filename)
+		InitStuffs(allModules)
+
 		log.Printf(">>> searching for loop of %s", start)
 		themap := make(map[string]any)
 		loopModules := TransitiveOutputs(start, allModules, themap)
+		// i think my bug is not to reset state of `allModules`
 		_, _, requestedPulses := FindSubGraphLoopLength(loopModules, allModules, end)
 		FilterMonitoredPulses(requestedPulses)
 		log.Printf("the pulses: +%v", requestedPulses)
 	}
+
+	// yeah. and now all cycles start from 1 (first button press)
+	// and then they emit the [high low] on last step of their cycle
+	// so just LCM of these all
 }
 
 func Count10000ButtonPresses(modules map[string]Module) (lowSignalsCount, highSignalsCount int) {