foo.cc: In function 'bool Judge1(int, int, int, int, std::string)':
foo.cc:9:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |   for(int i=0;i<t.length();i++)
      |               ~^~~~~~~~~~~
foo.cc:14:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |         for(int j=i;j<t.length();j++)
      |                     ~^~~~~~~~~~~
foo.cc:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |         for(int j=i;j<t.length();j++)
      |                     ~^~~~~~~~~~~
foo.cc:28:1: warning: control reaches end of non-void function [-Wreturn-type]
   28 | }
      | ^

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