Data Structures

Hand-Rolled Hash Map

Difficulty

Asked at IMC Trading, Headlands Technologies

Theory: Data Structures You Implement, Not Import

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Available in C++ and Python. You are solving it in C++. Switch to Python

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Language:

C++23 Python 3.12

FlatHashMap

#include <cstddef>
#include <cstdint>
#include <optional>
#include <vector>

// ...
// ...
// ...
// ...
// ...
class FlatHashMap {
public:
    FlatHashMap() {
        // ...
    }

    bool insert(long long key, long long value) {
        // ...
        // ...
        (void)key;
        (void)value;
        return false;
    }

    bool erase(long long key) {
        // ...
        (void)key;
        return false;
    }

    std::optional<long long> find(long long key) const {
        // ...
        (void)key;
        return std::nullopt;
    }

    std::size_t size() const {
        // ...
        return 0;
    }
};

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