• 2022-06-07
    求排列[tex=16.714x1.643]CeOWlpLvH8Qhk/RmfIvBHRDnvEbtFozo/cgXGjxY0gzNSKUlah1Ha1p4w4qxJSSr7a+mR/Ef4e9kMI7WB9PWIzDra9uS381J5bi8bK9i8OYJPB6m0PyetB4vxp9TAjC3pJqS3AAnNYCrnA6mccUf8Q==[/tex]的逆序数.
  • 举一反三