chore: add note on connection bug

believer · believer · commit 8e3409021e26 · 2025-12-08T15:29:38.000+01:00
diff --git a/go/2025/puzzles/day08/main.go b/go/2025/puzzles/day08/main.go
@@ -26,7 +26,9 @@ func part1(name string, count int) int {
 
 	dsu := dsu.New(len(coords))
 
-	// Create X unions in the DSU
+	// Create X unions in the DSU. I had a bug here for the longest time.
+	// I was incrementing "connected" when a union was _successful_, which
+	// made more checks that required.
 	for i := range count {
 		dsu.Union(edges[i].P1, edges[i].P2)
 	}

Original file line number	Diff line number	Diff line change
`@@ -26,7 +26,9 @@ func part1(name string, count int) int {`
`26`	`26`
`27`	`27`	`dsu := dsu.New(len(coords))`
`28`	`28`
`29`		`- // Create X unions in the DSU`
	`29`	`+ // Create X unions in the DSU. I had a bug here for the longest time.`
	`30`	`+ // I was incrementing "connected" when a union was _successful_, which`
	`31`	`+ // made more checks that required.`
`30`	`32`	`for i := range count {`
`31`	`33`	`dsu.Union(edges[i].P1, edges[i].P2)`
`32`	`34`	`}`