ndim_ds 0.1.2

A collection of optimized N-dimensional data structures in Python

N-Dimensional Data Structures

A library providing generalized N-dimensional data structures for C++ and Python.

Data Structures Included

1. Static N-Dim Prefix Sum (static_n_dim_prefix_sum)
2. Static N-Dim Difference Array (static_n_dim_difference_array)
3. Dynamic N-Dim Fenwick Tree (dynamic_n_dim_fenwick_tree)
4. Dynamic N-Dim Difference Fenwick Tree (dynamic_n_dim_diff_fenwick_tree)
5. Dynamic N-Dim Range Fenwick Tree (dynamic_n_dim_range_fenwick_tree)
6. Dynamic N-Dim Segment Tree (dynamic_n_dim_seg_tree)

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C++ Usage

The cpp/include/ndim/ directory contains header-only C++23 templates formatted for competitive programming. They use #include <bits/stdc++.h> and using namespace std;.

Example

#include "dynamic_n_dim_seg_tree.hpp"

// Example: 3D Segment Tree using std::min
auto min_func = [](int64_t a, int64_t b) { return min(a, b); };
int64_t def = 1e18;

// 4x4x4 grid
DynamicNDimSegTree<int64_t, decltype(min_func)> tree({4, 4, 4}, min_func, def);

tree.update({1, 1, 1}, 5);
tree.update({2, 2, 2}, 10);

int64_t val = tree.query_range({0, 0, 0}, {3, 3, 3});

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Python Usage

The python/src/ directory contains the Python implementations. The package is available on PyPI.

Installation

pip install ndim_ds

Example

from static_n_dim_prefix_sum import StaticNDimPrefixSum

# 10x10x10 grid
grid = StaticNDimPrefixSum([10, 10, 10])

grid.add([1, 1, 1], 50)
grid.add([5, 5, 5], 25)
grid.sweep()

total = grid.query_range([0, 0, 0], [3, 3, 3])

Testing

• Python: Run uv run pytest test/
• C++: Compile the files in cpp/test/ using g++ -std=c++23 and run the resulting executables.