Iterator Iterator¶ 1586. Binary Search Tree Iterator II 1286. Iterator for Combination 900. RLE Iterator 604. Design Compressed String Iterator 341. Flatten Nested List Iterator 284. Peeking Iterator 281. Zigzag Iterator 251. Flatten 2D Vector 173. Binary Search Tree Iterator Was this page helpful? Thanks for your feedback! Thanks for your feedback! Help us improve this page by using our feedback form.