foo.cc: In function 'int main()':
foo.cc:11:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |         while(i<s.size())
      |               ~^~~~~~~~~
foo.cc:14:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |                 while(s[tmp]==t[j]&&j<t.size()&&tmp<s.size())
      |                                     ~^~~~~~~~~
foo.cc:14:52: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |                 while(s[tmp]==t[j]&&j<t.size()&&tmp<s.size())
      |                                                 ~~~^~~~~~~~~
foo.cc:17:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |                 if(j==t.size())
      |                    ~^~~~~~~~~~

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