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Update 217-Contains-Duplicate.java#303
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Use the return value of `add` function in `Set` instead of using `contains` and `add` function separately.
neetcode-gh pushed a commit that referenced this pull requestJul 2, 2022
Update 217-Contains-Duplicate.java
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Use the return value of
addfunction inSetinstead of usingcontainsandaddfunction separately.