Compilare: user.cpp: In function ‘void suma(std::vector<int>&, std::vector<int>&, std::vector<int>&)’: user.cpp:49:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i(0); i < max(a.size(), b.size()); i++) { ^ user.cpp:52:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < a.size()) ^ user.cpp:54:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < b.size()) ^ user.cpp: In function ‘int main()’: user.cpp:21:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^