int n2 = right - mid; // 右子数组长度
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Create a Rust/Python package (through `pyo3` and `maturin`) that efficiently and super-quickly takes an Icon Font and renders an image based on the specified icon. The icon fonts are present in `assets`, and the CSS file which maps the icon name to the corresponding reference in the icon font is in `fontawesome.css`.
// 测试用例（可直接运行验证）