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示例：nums = [2,1,2,4,3] → res = [4,2,4,-1,-1]。
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Хаваджа Асифминистр обороны Пакистана
Browse the implementors of #beVariable message and you will find other filters under BPatternVariableNode class, such as #beInstVar or #beLocalVar. If you miss something, just add a method. No new syntax required.