Every incoming number checks the stack top. Smaller than the newcomer? Crushed — and the newcomer just became its "next greater element." Bigger? The newcomer waits patiently on top.
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📚 StackI only ever compare my top block to whoever just arrived. Everything below just waits its turn.
💥 CrusherThe moment I'm bigger than the block on top, it's gone — and I just answered its "next greater" question.