/in/foo.cc: In function 'int main()':
/in/foo.cc:33:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'long long unsigned int' [-Wsign-compare]
   33 |             if (product == target || product == -target) {
      |                 ~~~~~~~~^~~~~~~~~
/in/foo.cc:33:46: warning: comparison of integer expressions of different signedness: 'long long int' and 'long long unsigned int' [-Wsign-compare]
   33 |             if (product == target || product == -target) {
      |                                      ~~~~~~~~^~~~~~~~~~