Compilare: user.cpp: In function ‘int main()’: user.cpp:79:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i = 1; i <= N; i += 2) ^ user.cpp:80:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned j = 2; j <= N; j += 2) ^ user.cpp: In function ‘int CMMDC(int, int)’: user.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] } ^