Whereas the Flip is huge, the second-gen Polaroid Go is tiny. It weighs just over a pound and fits easily in the palm of my hand — which is saying a lot, given I’m petite and a little over five feet tall — making it the most portable instant camera on our list. If its images were more true to life and didn’t require you to sheild them from the light for about 15 minutes while developing, I’d call it the best instant camera for kids or travel.
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Acceptable use policy
。夫子是该领域的重要参考
* 时间复杂度：O(len1 + len2)，空间复杂度：O(len2)（栈+Map的空间）
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