/in/foo.cc: In function 'std::vector<int> add(std::vector<int>&, std::vector<int>&)':
/in/foo.cc:27:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         if (i < b.size()) t += b[i];
      |             ~~^~~~~~~~~~
/in/foo.cc:28:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         if (i < c.size()) t += c[i];
      |             ~~^~~~~~~~~~
/in/foo.cc: In function 'std::vector<int> dec1(std::vector<int>&)':
/in/foo.cc:38:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for (i = 0; i < b.size(); i++)
      |                 ~~^~~~~~~~~~
/in/foo.cc: In function 'std::vector<int> mult(std::vector<int>&, std::vector<int>&)':
/in/foo.cc:58:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for (i = 0; i < b.size(); i++)
      |                 ~~^~~~~~~~~~
/in/foo.cc:60:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         for (j = 0; j < c.size(); j++)
      |                     ~~^~~~~~~~~~
/in/foo.cc: In function 'std::vector<int> mult0(std::vector<int>&, int)':
/in/foo.cc:80:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |     for (i = 0; i < b.size() || (cc > 0); i++)
      |                 ~~^~~~~~~~~~
/in/foo.cc:83:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |         if (i < b.size()) t += b[i] * x;
      |             ~~^~~~~~~~~~