File list (Check if you may need any files):
yichuansuanfa\ConsoleApplication1\ConsoleApplication1\ConsoleApplication1.csproj
.............\...................\...................\DB.cs
.............\...................\...................\Paper.cs
.............\...................\...................\Problem.cs
.............\...................\...................\ProblemComparer.cs
.............\...................\...................\Program.cs
.............\...................\...................\...perties\AssemblyInfo.cs
.............\...................\...................\Unit.cs
.............\...................\ConsoleApplication1.sln
.............\...................\ConsoleApplication1.suo
.............\...................\...................\Properties
.............\...................\ConsoleApplication1
.............\ConsoleApplication1
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