规范格式

leetcode/0404.Sum-of-Left-Leaves/404. Sum of Left Leaves.go

@@ -0,0 +1,27 @@
+package leetcode
+
+import (
+	"github.com/halfrost/LeetCode-Go/structures"
+)
+
+// TreeNode define
+type TreeNode = structures.TreeNode
+
+/**
+ * Definition for a binary tree node.
+ * type TreeNode struct {
+ *     Val int
+ *     Left *TreeNode
+ *     Right *TreeNode
+ * }
+ */
+
+func sumOfLeftLeaves(root *TreeNode) int {
+	if root == nil {
+		return 0
+	}
+	if root.Left != nil && root.Left.Left == nil && root.Left.Right == nil {
+		return root.Left.Val + sumOfLeftLeaves(root.Right)
+	}
+	return sumOfLeftLeaves(root.Left) + sumOfLeftLeaves(root.Right)
+}