foo.cc: In function 'void Output(std::vector<int>&)':
foo.cc:8:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(int i=0; i<v.size(); i++)
      |                  ~^~~~~~~~~
foo.cc: In function 'int Search(std::vector<int>&, int)':
foo.cc:23:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(int i=0; i<v.size(); i++)
      |                  ~^~~~~~~~~

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