olympiad-informatics

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USACO 2026 Second Contest: Bronze, Silver and Gold problems explained, with verified C++17 solutions.

超级快读快写 C++ 单头文件库：mmap+双字节打表读（8.5x cin）、fwrite+四位打表写（3.2x cout），并把每种 IO 写法都拆成独立头文件

performance cpp competitive-programming io header-only mmap fastio olympiad-informatics

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