/in/foo.cc: In function 'int main()':
/in/foo.cc:43:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<NumInfo>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   for (int i = 0; i < nums.size(); i++) {
      |                   ~~^~~~~~~~~~~~~