/in/foo.cc: In function 'int irmat(std::vector<int>)':
/in/foo.cc:45:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for (i = 0; i < b.size(); i++)
      |                 ~~^~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:125:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<str>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  125 |         for (i = 0; i < mov.size(); i++)
      |                     ~~^~~~~~~~~~~~