989 wrong answer

Author: aQuaYi

Algorithms/0989.add-to-array-form-of-integer/add-to-array-form-of-integer.go

@@ -1,6 +1,27 @@
 package problem0989
 
+import "strconv"
+
 func addToArrayForm(A []int, K int) []int {
+	a := slice2num(A)
+	a += K
+	return num2Slice(a)
+}
+
+func slice2num(A []int) int {
+	res := 0
+	for _, v := range A {
+		res = res*10 + v
+	}
+	return res
+}
 
-	return nil
+func num2Slice(n int) []int {
+	s := strconv.Itoa(n)
+	bytes := []byte(s)
+	res := make([]int, len(bytes))
+	for i, b := range bytes {
+		res[i] = int(b - '0')
+	}
+	return res
 }

Algorithms/0989.add-to-array-form-of-integer/add-to-array-form-of-integer_test.go

@@ -13,6 +13,12 @@ var tcs = []struct {
 	ans []int
 }{
 
+	{
+		[]int{1, 2, 6, 3, 0, 7, 1, 7, 1, 9, 7, 5, 6, 6, 4, 4, 0, 0, 6, 3},
+		516,
+		[]int{1, 2, 6, 3, 0, 7, 1, 7, 1, 9, 7, 5, 6, 6, 4, 4, 0, 5, 7, 9},
+	},
+
 	{
 		[]int{1, 2, 0, 0},
 		34,