Data commit

Task/Gapful-numbers/Go/gapful-numbers.go

@@ -0,0 +1,41 @@
+package main
+
+import "fmt"
+
+func commatize(n uint64) string {
+    s := fmt.Sprintf("%d", n)
+    le := len(s)
+    for i := le - 3; i >= 1; i -= 3 {
+        s = s[0:i] + "," + s[i:]
+    }
+    return s
+}
+
+func main() {
+    starts := []uint64{1e2, 1e6, 1e7, 1e9, 7123}
+    counts := []int{30, 15, 15, 10, 25}
+    for i := 0; i < len(starts); i++ {
+        count := 0
+        j := starts[i]
+        pow := uint64(100)
+        for {
+            if j < pow*10 {
+                break
+            }
+            pow *= 10
+        }
+        fmt.Printf("First %d gapful numbers starting at %s:\n", counts[i], commatize(starts[i]))
+        for count < counts[i] {
+            fl := (j/pow)*10 + (j % 10)
+            if j%fl == 0 {
+                fmt.Printf("%d ", j)
+                count++
+            }
+            j++
+            if j >= 10*pow {
+                pow *= 10
+            }
+        }
+        fmt.Println("\n")
+    }
+}