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[itschrisjang] WEEK 01 solutions #1143

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Apr 8, 2025
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[itschrisjang] WEEK 01 solutions #1143

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17 changes: 17 additions & 0 deletions contains-duplicate/itschrisjang.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
import java.util.HashSet;

class Solution {
public boolean containsDuplicate(int[] nums) {
HashSet<Integer> numSet = new HashSet<>();

for (int i = 0; i < nums.length; i++) {

if (numSet.contains(nums[i])) {
return true;
}
numSet.add(nums[i]);
}

return false;
}
}