foo.cc: In constructor 'Node::Node(char, int)':
foo.cc:7:8: warning: 'Node::data' will be initialized after [-Wreorder]
    7 |   char data;
      |        ^~~~
foo.cc:5:13: warning:   'int Node::n' [-Wreorder]
    5 |         int n;
      |             ^
foo.cc:8:3: warning:   when initialized here [-Wreorder]
    8 |   Node(char data,int n):data(data),n(n),next(NULL){}
      |   ^~~~
foo.cc: In function 'void Match(char*)':
foo.cc:57:23: warning: unknown escape sequence: '\N'
   57 |                 cout<<"ok\N";
      |                       ^~~~~~

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