Add solution 989

leetcode/0989.Add-to-Array-Form-of-Integer/989. Add to Array-Form of Integer.go

@@ -0,0 +1,25 @@
+package leetcode
+
+func addToArrayForm(A []int, K int) []int {
+	res := []int{}
+	for i := len(A) - 1; i >= 0; i-- {
+		sum := A[i] + K%10
+		K /= 10
+		if sum >= 10 {
+			K++
+			sum -= 10
+		}
+		res = append(res, sum)
+	}
+	for ; K > 0; K /= 10 {
+		res = append(res, K%10)
+	}
+	reverse(res)
+	return res
+}
+
+func reverse(A []int) {
+	for i, n := 0, len(A); i < n/2; i++ {
+		A[i], A[n-1-i] = A[n-1-i], A[i]
+	}
+}