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0341-0350

341. Flatten Nested List Iterator $\star\star$

342. Power of Four $\star$

343. Integer Break $\star\star$

344. Reverse String $\star$

345. Reverse Vowels of a String $\star$

346. Moving Average from Data Stream $\star$

347. Top K Frequent Elements $\star\star$

348. Design Tic-Tac-Toe $\star\star$

349. Intersection of Two Arrays $\star$

350. Intersection of Two Arrays II $\star$