ワーシャルフロイド法 (lib/graph/floyd_warshall.hpp)

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• Last update: 2025-06-13 13:22:21+09:00
• Include: #include "lib/graph/floyd_warshall.hpp"

Depends on

• 隣接行列 (lib/graph/matrix_graph.hpp)
• lib/template/template.hpp

Verified with

• test/aoj/grl/floyd_warshall.test.cpp
• test/aoj/jag/hopcroft_karp.test.cpp

Code

#pragma once
#include "graph/matrix_graph.hpp"
#include "template/template.hpp"

/// @brief ワーシャルフロイド法
template <class T>
void floyd_warshall(matrix_graph<T> &g) {
    int n = g.size();
    for (int i = 0; i < n; ++i) g[i][i] = T();
    for (int k = 0; k < n; ++k) {
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < n; ++j) { chmin(g[i][j], g[i][k] + g[k][j]); }
        }
    }
}

Traceback (most recent call last):
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/resolver.py", line 291, in resolve
    bundled_code = language.bundle(path, basedir=basedir)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/verify/languages/cplusplus.py", line 242, in bundle
    bundler.update(path)
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/verify/languages/cplusplus_bundle.py", line 479, in update
    self._resolve(pathlib.Path(included), included_from=path)
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/verify/languages/cplusplus_bundle.py", line 286, in _resolve
    raise BundleErrorAt(path, -1, "no such header")
competitive_verifier.oj.verify.languages.cplusplus_bundle.BundleErrorAt: graph/matrix_graph.hpp: line -1: no such header

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