add new solutions

solutions/0/q2/solution.go

@@ -0,0 +1,35 @@
+package q2
+
+type ListNode struct {
+	Val  int
+	Next *ListNode
+}
+
+func addTwoNumbers(l1 *ListNode, l2 *ListNode) *ListNode {
+	retRoot := &ListNode{}
+
+	p := retRoot
+	carry := 0
+	for l1 != nil || l2 != nil {
+		val := carry
+		if l1 != nil {
+			val += l1.Val
+			l1 = l1.Next
+		}
+		if l2 != nil {
+			val += l2.Val
+			l2 = l2.Next
+		}
+
+		carry, val = val/10, val%10
+		node := &ListNode{Val: val}
+		p.Next = node
+		p = node
+	}
+	if carry > 0 {
+		p.Next = &ListNode{Val: carry}
+	}
+	return retRoot.Next
+}
+
+var _ = addTwoNumbers