✨ feat(pyproject.toml)：添加mplusa依赖用于最大路径和计算

✨ feat(solutions)：新增欧拉问题17、18和67的解决方案
📝 docs(solutions/0018.MaxPathSum1)：添加说明文档指出初始解法存在局部最优问题
✨ feat(solutions/0067.MaxPathSum2)：实现基于最大加代数的优化解法

uv.lock

@@ -2,6 +2,15 @@ version = 1
 revision = 3
 requires-python = ">=3.12"
 
+[[package]]
+name = "mplusa"
+version = "0.0.3"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "numpy" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/99/9f/dfe3bc767d4bd1de30de01cafefc8e5270b18f4949c1558de26bef172715/mplusa-0.0.3.tar.gz", hash = "sha256:2fab75c054b1b425d678d013ed15c7b3fed1747fbbd3fcd4da8e023c57d4f323", size = 7990, upload-time = "2025-09-18T13:54:45.02Z" }
+
 [[package]]
 name = "numpy"
 version = "2.3.5"
@@ -70,8 +79,12 @@ name = "projecteuler"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
+    { name = "mplusa" },
     { name = "numpy" },
 ]
 
 [package.metadata]
-requires-dist = [{ name = "numpy", specifier = ">=2.3.5" }]
+requires-dist = [
+    { name = "mplusa", specifier = ">=0.0.3" },
+    { name = "numpy", specifier = ">=2.3.5" },
+]