/in/foo.cc: In function 'int main()':
/in/foo.cc:23:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < nums.size(); i++)
                 ~~^~~~~~~~~~~~~
/in/foo.cc:24:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j = 0; j < nums.size() - i; j++)
                  ~~^~~~~~~~~~~~~~~~~
/in/foo.cc:27:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int q = i; q <= i + j && q < nums.size(); q++)
                                 ~~^~~~~~~~~~~~~