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Merged
merged 2 commits into from
Nov 13, 2023
Merged

Create 0705-design-hash-set.cpp #3123

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9419d3f
C++ solution for design hash set
nkawaller Nov 10, 2023
a17875f
Rename 0705-design-hash-set.cpp to 0705-design-hashset.cpp
MHamiid Nov 13, 2023
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C++ solution for design hash set
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@nkawaller
nkawaller committed Nov 10, 2023
commit 9419d3fbc6262639ed6cd344d91cddbb6d21cb87
25 changes: 25 additions & 0 deletions cpp/0705-design-hash-set.cpp
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Original file line number Diff line number Diff line change
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// Time: O(n)
// Space: O(n)

class MyHashSet {
public:
void add(int key) {
if (!contains(key)) {
hashSet.push_back(key);
}
}

void remove(int key) {
auto k = find(hashSet.begin(), hashSet.end(), key);
if (k != hashSet.end()) {
hashSet.erase(k);
}
}

bool contains(int key) {
return (find(hashSet.begin(), hashSet.end(), key) != hashSet.end());
}

private:
vector<int> hashSet;
};