add: leetcode 0728 solution

leetcode/0728.Self-Dividing-Numbers/728.Self Dividing Numbers.go

@@ -0,0 +1,24 @@
+package leetcode
+
+func selfDividingNumbers(left int, right int) []int {
+	var ans []int
+	for num := left; num <= right; num++ {
+		if selfDividingNum(num) {
+			ans = append(ans, num)
+		}
+	}
+	return ans
+}
+
+func selfDividingNum(num int) bool {
+	for d := num; d > 0; d = d / 10 {
+		reminder := d % 10
+		if reminder == 0 {
+			return false
+		}
+		if num%reminder != 0 {
+			return false
+		}
+	}
+	return true
+}