Compilare: user.cpp: In function ‘std::vector<int> Intersection(const std::vector<int>&, const std::vector<int>&)’: user.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a < A.size() && b < B.size()){ ^ user.cpp:18:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a < A.size() && b < B.size()){ ^ user.cpp: In function ‘std::vector<int> Diference(const std::vector<int>&, const std::vector<int>&)’: user.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a < A.size() && b < B.size()){ ^ user.cpp:36:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a < A.size() && b < B.size()){ ^ user.cpp:48:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a < A.size()){ ^ user.cpp: In function ‘std::vector<int> Reunion(const std::vector<int>&, const std::vector<int>&)’: user.cpp:58:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a < A.size() && b < B.size()){ ^ user.cpp:58:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a < A.size() && b < B.size()){ ^ user.cpp:72:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a < A.size()){ ^ user.cpp:76:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(b < B.size()){ ^ user.cpp: In function ‘void Print()’: user.cpp:102:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < A.size() - 1; i++){ ^