tasks a-s

Task/Self-describing-numbers/Go/self-describing-numbers.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+    "fmt"
+    "strconv"
+    "strings"
+)
+
+// task 1 requirement
+func sdn(n int64) bool {
+    if n >= 1e10 {
+        return false
+    }
+    s := strconv.FormatInt(n, 10)
+    for d, p := range s {
+        if int(p)-'0' != strings.Count(s, strconv.Itoa(d)) {
+            return false
+        }
+    }
+    return true
+}
+
+// task 2 code (takes a while to run)
+func main() {
+    for n := int64(0); n < 1e10; n++ {
+        if sdn(n) {
+            fmt.Println(n)
+        }
+    }
+}