Compilare: user.cpp: In function ‘int main()’: user.cpp:51:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 0; k < Fact[j].size() && Good; ++ k) ^ user.cpp:56:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 0; k < Fact[j].size(); ++ k) ^ user.cpp:63:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 0; k < Fact[i].size(); ++ k) ^