Compilare: user.cpp: In function ‘std::vector<int> aduna(std::vector<int>, std::vector<int>)’: user.cpp:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size() || i < b.size() || t != 0; i++) ^ user.cpp:22:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size() || i < b.size() || t != 0; i++) ^ user.cpp:24:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( i >= a.size() ) ^ user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( i >= b.size() ) ^