Compilare: user.cpp: In function ‘std::vector<int> combinare(std::vector<int>, std::vector<int>)’: user.cpp:24:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ret1.size(); i++) ^ user.cpp:27:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ret2.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:91:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < result.size(); i++) ^