advent hell

day10/main.go

@@ -34,14 +34,20 @@ func main() {
     fmt.Println("Part 1:", counts[1] * counts[3])
     // Part 2: Find number of skippable adapters
     skippable := 0
-    for i, _ := range ints {
-        if !(i == 0 || i+1 == len(ints)) { // The first and last cannot be removed
-            if ints[i+1] - ints[i-1] <= 3 {
-                skippable += 1
-            }
-        }
+    // Get number of possible skips. Dropping can only happen with multiple 1s in a row. 
+    // Find run-lengths of 1s, add that -1 to the skippables.
+    run := 0
+    for _, g := range gaps {
+    	if g == 1 {
+    		run += 1
+    	} else {
+    		skippable += (run-1)
+    		run = 0
+    	}
     }
-
+    
     fmt.Println(gaps)
+    fmt.Println(skippable)
+    fmt.Println(ints)
     fmt.Printf("Part 2: %f\n", math.Pow(2, float64(skippable))-1) // All possible combinations for n, according to wikipedia
-}
+}