Java-coding Problems Pdf Github Work [Latest | CHOICE]

void serializeHelper(TreeNode node, StringBuilder sb) if (node == null) sb.append("#,"); return; sb.append(node.val).append(","); serializeHelper(node.left, sb); serializeHelper(node.right, sb);

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The author maintains an official GitHub repository containing complete, runnable projects for all 300+ problems featured in the book. "Cracking the Coding Interview" by Gayle Laakmann McDowell void serializeHelper(TreeNode node