foo.cc: In function 'int main()':
foo.cc:31:31: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   31 |                 if (s.find(t) != -1)puts("automaton");
      |                     ~~~~~~~~~~^~~~~

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