foo.cc: In function 'int main(int, char**)':
foo.cc:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         for (i = 0; i < vtSample.size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~
foo.cc:34:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<StatUnit>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |                 for (j = 0; j < vtStatResult.size(); j++)
      |                             ~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:51:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<StatUnit>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |                 if (j == vtStatResult.size())
      |                     ~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:59:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<StatUnit>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |         for (i = 0; i < vtStatResult.size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~~~~~

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