commit 3fbcaa9

feat(go): add go

 1@@ -0,0 +1,35 @@
 2+# If you prefer the allow list template instead of the deny list, see community template:
 3+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
 4+#
 5+# Binaries for programs and plugins
 6+*.exe
 7+*.exe~
 8+*.dll
 9+*.so
10+*.dylib
11+
12+# Test binary, built with `go test -c`
13+*.test
14+
15+# Code coverage profiles and other test artifacts
16+*.out
17+coverage.*
18+*.coverprofile
19+profile.cov
20+
21+# Dependency directories (remove the comment below to include it)
22+# vendor/
23+
24+# Go workspace file
25+go.work
26+go.work.sum
27+
28+# env file
29+.env
30+
31+# Editor/IDE
32+# .idea/
33+# .vscode/
34+
35+# Resulting binary
36+rosetta-collatz

1@@ -0,0 +1,3 @@
2+module rosetta-collatz
3+
4+go 1.24.4

 1@@ -0,0 +1,51 @@
 2+package main
 3+
 4+import (
 5+	"strings"
 6+	"fmt"
 7+	"log"
 8+)
 9+
10+func collatz(a int) int {
11+	if a % 2 == 0 {
12+		return a / 2;
13+	}
14+
15+	return 3 * a + 1;
16+}
17+
18+func collatzSequence(a int) (string, error) {
19+	var sb strings.Builder
20+	_, err := fmt.Fprintf(&sb, "%d: ", a)
21+	if err != nil {
22+		return "", err
23+	}
24+
25+	for i := a; i >= 1; i = collatz(i) {
26+		if (i == 1) {
27+			_, err = sb.WriteString("1")
28+			if err != nil {
29+				return "", err
30+			}
31+			break
32+		}
33+		_, err = fmt.Fprintf(&sb, "%d, ", i)
34+		if err != nil {
35+			return "", err
36+		}
37+	}
38+
39+	return sb.String(), nil
40+}
41+
42+func main() {
43+	var err error
44+	var message string
45+	for i := 1; i <= 10000; i++ {
46+		message, err = collatzSequence(i)
47+		if err != nil {
48+			log.Fatalln(err)
49+		}
50+		fmt.Println(message)
51+	}
52+}