Compilare: user.cpp: In function ‘void Solve()’: user.cpp:66:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < A[d].size(); i++) ^ user.cpp:67:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < B[d].size(); j++) ^ user.cpp:71:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < A[i].size(); j++) ^ user.cpp:72:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < B[i].size(); k++) ^