/in/foo.cc: In member function 'BigInt BigInt::operator*(int)':
/in/foo.cc:18:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |         for(int i=0;i<num.size();i++)
      |                     ~^~~~~~~~~~~
/in/foo.cc: In member function 'BigInt BigInt::operator+(BigInt&)':
/in/foo.cc:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for(int i=0;i<num.size()||i<b.num.size();i++)
      |                     ~^~~~~~~~~~~
/in/foo.cc:36:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for(int i=0;i<num.size()||i<b.num.size();i++)
      |                                   ~^~~~~~~~~~~~~
/in/foo.cc:38:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |             int aval=(i<num.size()?num[i]:0);
      |                       ~^~~~~~~~~~~
/in/foo.cc:39:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |             int bval=(i<b.num.size()?b.num[i]:0);
      |                       ~^~~~~~~~~~~~~